finished incomplete sentence
Highlight markdown syntax in .md files using Redcarpet+CodeRay

Currently, there are something like three ways we do syntax highlighting in this app:

In .step files, you can have a 'source_code' step that specifies
a language parameter. This makes a <pre class='code'> tag that
contains the language name as ':::ruby', to be scooped out by
Rack::Codehighlighter.

In .deck.md files, you can use Github-flavored "```ruby" style
'fenced code blocks', which get parsed by redcarpet into <pre><code>
blocks, which inexplicably and briefly have an '@@@ ruby' directive
that is picked up by the Rack::Codehighlighter middleware.

In .md files (as of this diff) you can do Github-flavored fenced
code blocks, which are parsed in the original render time into
<pre class='CodeRay'> blocks that have the real syntax highlighting.

'Fenced code blocks' produced in Markdown-aware erector functions
(like 'message') don't seem to produce highlighted code. Will
probably improve on this in a subsequent diff.
Remove rdiscount/GithubFlavoredMarkdown class in favor of Redcarpet
Clean up use of __FILE__ in tests where a simple 'require' works fine

Remove old railsbridge-apps.md todo-lookin' file
removed accidentally checked in empty slide
Merge pull request #152 from rearadmiral/teachers_are_here_to

finished incomplete sentence
fix syntax for float examples in beginner slide deck

Previous examples were not valid Ruby syntax. `.0.0` and `.33` would result in a syntax error if typed as is.
Merge pull request #155 from baroquebobcat/patch-1

fix syntax for float examples in beginner slide deck
TOC now shows nested items of the selected page.

Previously, if a page was selected, all its children didn't show on the TOC.
This looked really dumb now that the TOC is always visible.
Updated rack to 1.5.2 which addresses CVE-2013-0262, CVE-2013-0263
Merge pull request #156 from chancancode/master

Updated rack to 1.5.2 which addresses CVE-2013-0262, CVE-2013-0263
update gems, jquery
Renames the challenge problem to use group as a variable name instead of class.
Make scaffold/migrate/server separate steps.

Many students at the intermediate railsbridge were accidentally pasting the three lines as one and ending up with a very strange migration. I've made these separate so that it is more clear that it is 3 distinct steps.
Merge branch 'patch-1' of https://github.com/jessetoth/docs into jessetoth-patch-1
Updated for Windows 8 based on Feb. 8 InstallFest in San Francisco

  - Instructions to install Node.js for Windows 8 only to address
    coffeescript compilation error (even on empty files)
Advise Windows 8 users to reboot after installing Node
Fix sidebar links on /docs site
Update Devise instructions for newest version and correct some mis-numbering
Adding more discussion topics and hints around creating posts for intermediate curriculum.