Updated diagrams

REST diagram pointed to nowhere. Couldn't find image in repo.
Added a good MVC diagram
Merge branch 'patch-2' of https://github.com/dladowitz/docs into dladowitz-patch-2
Footer should be at the bottom, even for small pages.

This regression was caused by me and it sure makes me feel foolish.
change MVC link to point to Hartl tutorial
update REST diagram link
put link to Alex's MVC diagram back in too
updated link to REST Diagram
Merge pull request #180 from dladowitz/master

Updated link for REST diagrams
updated sublime link in Lion install
Merge branch 'master' of https://github.com/dladowitz/docs into dladowitz-master
Update src link to toggle between source and text

- added src_url method to DocPage and replaced src link href with call to src_url
- override src_url in RawPage to link back to text of page
- add .ruby-version to .gitignore as rvm now uses .ruby-version files
Add words about workshops to teacher training deck
made the code block explicit around the list of routes
Change heroku instructions to use Toolbelt instead of Gem
Rewrite of 'Introduction to HTML' page
improve structure of several front end pages
Spelling
Smooth out ambuguity in 'install homebrew' / 'which git' section
Link to ANSICON 1.61 instead of 1.53
Sublime Text 2 isn notcompatible with OS X 10.5 and lower.