Default help page

Help.page

@@ -0,0 +1,325 @@
+# Navigating
+
+The most natural way of navigating is by clicking wiki links that
+connect one page with another. The "Front page" link in the navigation
+bar will always take you to the Front Page of the wiki. The "All pages"
+link will take you to a list of all pages on the wiki (organized into
+folders if directories are used). Alternatively, you can search using
+the search box. Note that the search is set to look for whole words, so
+if you are looking for "gremlins", type that and not "gremlin".
+The "go" box will take you directly to the page you type.
+
+# Creating and modifying pages
+
+## Registering for an account
+
+In order to modify pages, you'll need to be logged in.  To register
+for an account, just click the "register" button in the bar on top
+of the screen.  You'll be asked to choose a username and a password,
+which you can use to log in in the future by clicking the "login"
+button.  While you are logged in, these buttons are replaced by
+a "logout so-and-so" button, which you should click to log out
+when you are finished.
+
+Note that logins are persistent through session cookies, so if you
+don't log out, you'll still be logged in when you return to the
+wiki from the same browser in the future.
+
+## Editing a page
+
+To edit a page, just click the "edit" button at the bottom right corner
+of the page.
+
+You can click "Preview" at any time to see how your changes will look.
+Nothing is saved until you press "Save."
+
+Note that you must provide a description of your changes.  This is to
+make it easier for others to see how a wiki page has been changed.
+
+## Page metadata
+
+Pages may optionally begin with a metadata block.  Here is an example:
+
+    ---
+    format: latex+lhs
+    categories: haskell math
+    toc: no
+    title: Haskell and
+      Category Theory
+    ...
+
+    \section{Why Category Theory?}
+
+The metadata block consists of a list of key-value pairs, each on a
+separate line. If needed, the value can be continued on one or more
+additional line, which must begin with a space. (This is illustrated by
+the "title" example above.) The metadata block must begin with a line
+`---` and end with a line `...` optionally followed by one or more blank
+lines.
+
+Currently the following keys are supported:
+
+format
+:   Overrides the default page type as specified in the configuration file.
+    Possible values are `markdown`, `rst`, `latex`, `html`, `markdown+lhs`,
+    `rst+lhs`, `latex+lhs`.  (Capitalization is ignored, so you can also
+    use `LaTeX`, `HTML`, etc.)  The `+lhs` variants indicate that the page
+    is to be interpreted as literate Haskell.  If this field is missing,
+    the default page type will be used.
+
+categories
+:   A space or comma separated list of categories to which the page belongs.
+
+toc
+:   Overrides default setting for table-of-contents in the configuration file.
+    Values can be `yes`, `no`, `true`, or `false` (capitalization is ignored).
+
+title
+:   By default the displayed page title is the page name.  This metadata element
+    overrides that default.
+
+## Creating a new page
+
+To create a new page, just create a wiki link that links to it, and
+click the link.  If the page does not exist, you will be editing it
+immediately.
+
+## Reverting to an earlier version
+
+If you click the "history" button at the bottom of the page, you will
+get a record of previous versions of the page.  You can see the differences
+between two versions by dragging one onto the other; additions will be
+highlighted in yellow, and deletions will be crossed out with a horizontal
+line.  Clicking on the description of changes will take you to the page
+as it existed after those changes.  To revert the page to the revision
+you're currently looking at, just click the "revert" button at the bottom
+of the page, then "Save". 
+
+## Deleting a page
+
+The "delete" button at the bottom of the page will delete a page.  Note
+that deleted pages can be recovered, since a record of them will still be
+accessible via the "activity" button on the top of the page.
+
+# Uploading files
+
+To upload a file--a picture, a PDF, or some other resource--click the
+"upload" button in the navigation bar.  You will be prompted to select
+the file to upload.  As with edits, you will be asked to provide a
+description of the resource (or of the change, if you are overwriting
+an existing file).
+
+Often you may leave "Name on wiki" blank, since the existing name of the
+file will be used by default.  If that isn't desired, supply a name.
+Note that uploaded files *must* include a file extension (e.g. `.pdf`).
+
+If you are providing a new version of a file that already exists on the
+wiki, check the box "Overwrite existing file." Otherwise, leave it
+unchecked.
+
+To link to an uploaded file, just use its name in a regular wiki link.
+For example, if you uploaded a picture `fido.jpg`, you can insert the
+picture into a (markdown-formatted) page as follows: `![fido](fido.jpg)`.
+If you uploaded a PDF `projection.pdf`, you can insert a link to it
+using:  `[projection](projection.pdf)`.
+
+
+
+# Markdown
+
+This wiki's pages are written in [pandoc]'s extended form of [markdown].
+If you're not familiar with markdown, you should start by looking
+at the [markdown "basics" page] and the [markdown syntax description].
+Consult the [pandoc User's Guide] for information about pandoc's syntax
+for footnotes, tables, description lists, and other elements not present
+in standard markdown.
+
+[pandoc]: http://johnmacfarlane.net/pandoc
+[pandoc User's Guide]: http://johnmacfarlane.net/pandoc/README.html
+[markdown]: http://daringfireball.net/projects/markdown
+[markdown "basics" page]: http://daringfireball.net/projects/markdown/basics
+[markdown syntax description]: http://daringfireball.net/projects/markdown/syntax 
+
+Markdown is pretty intuitive, since it is based on email conventions.
+Here are some examples to get you started:
+
+<table>
+<tr>
+<td>`*emphasized text*`</td>
+<td>*emphasized text*</td>
+</tr>
+<tr>
+<td>`**strong emphasis**`</td>
+<td>**strong emphasis**</td>
+</tr>
+<tr>
+<td>`` `literal text` ``</td>
+<td>`literal text`</td>
+</tr>
+<tr>
+<td>`\*escaped special characters\*`</td>
+<td>\*escaped special characters\*</td>
+</tr>
+<tr>
+<td>`[external link](http://google.com)`</td>
+<td>[external link](http://google.com)</td>
+</tr>
+<tr>
+<td>`![folder](/img/icons/folder.png)`</td>
+<td>![folder](/img/icons/folder.png)</td>
+</tr>
+<tr>
+<td>Wikilink: `[Front Page]()`</td>
+<td>Wikilink: [Front Page]()</td>
+</tr>
+<tr>
+<td>`H~2~O`</td>
+<td>H~2~O</td>
+</tr>
+<tr>
+<td>`10^100^`</td>
+<td>10^100^</td>
+</tr>
+<tr>
+<td>`~~strikeout~~`</td>
+<td>~~strikeout~~</td>
+</tr>
+<tr>
+<td>
+`$x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}$`
+</td>
+<td>
+$x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}$^[If this looks like
+code, it's because jsMath is
+not installed on your system.  Contact your administrator to request it.]
+</td>
+</tr>
+<tr>
+<td>
+`A simple footnote.^[Or is it so simple?]`
+</td>
+<td>
+A simple footnote.^[Or is it so simple?]
+</td>
+</tr>
+<tr>
+<td>
+<pre>
+> an indented paragraph,
+> usually used for quotations
+</pre>
+</td>
+<td>
+
+> an indented paragraph,
+> usually used for quotations
+
+</td>
+<tr>
+<td>
+<pre>
+    #!/bin/sh -e
+    # code, indented four spaces
+    echo "Hello world"
+</pre>
+</td>
+<td>
+
+    #!/bin/sh -e
+    # code, indented four spaces
+    echo "Hello world"
+
+</td>
+</tr>
+<tr>
+<td>
+<pre>
+* a bulleted list
+* second item
+    - sublist
+    - and more
+* back to main list
+    1. this item has an ordered
+    2. sublist
+        a) you can also use letters
+        b) another item
+</pre>
+</td>
+<td>
+
+* a bulleted list
+* second item
+    - sublist
+    - and more
+* back to main list
+    1. this item has an ordered
+    2. sublist
+        a) you can also use letters
+        b) another item
+
+</td>
+</tr>
+<tr>
+<td>
+<pre>
+Fruit        Quantity
+--------  -----------
+apples         30,200
+oranges         1,998
+pears              42
+
+Table:  Our fruit inventory
+</pre>
+</td>
+<td>
+
+Fruit        Quantity
+--------  -----------
+apples         30,200
+oranges         1,998
+pears              42
+
+Table:  Our fruit inventory
+
+</td>
+</tr>
+</table>
+
+For headings, prefix a line with one or more `#` signs:  one for a major heading,
+two for a subheading, three for a subsubheading.  Be sure to leave space before
+and after the heading.
+
+    # Markdown
+
+    Text...
+ 
+    ## Some examples...
+   
+    Text...
+
+## Wiki links
+
+Links to other wiki pages are formed this way:  `[Page Name]()`.
+(Gitit converts markdown links with empty targets into wikilinks.)
+
+To link to a wiki page using something else as the link text:
+`[something else](Page Name)`.
+
+Note that page names may contain spaces and some special characters.
+They need not be CamelCase.  CamelCase words are *not* automatically
+converted to wiki links.
+
+Wiki pages may be organized into directories.  So, if you have
+several pages on wine, you may wish to organize them like so:
+
+    Wine/Pinot Noir
+    Wine/Burgundy
+    Wine/Cabernet Sauvignon
+
+Note that a wiki link `[Burgundy]()` that occurs inside the `Wine`
+directory will link to `Wine/Burgundy`, and not to `Burgundy`.
+To link to a top-level page called `Burgundy`, you'd have to use
+`[Burgundy](/Burgundy)`.
+
+To link to a directory listing for a subdirectory, use a trailing
+slash: `[Wine/]()` will link to a listing of the `Wine` subdirectory.