Add first draft GitHub feature slides
Complete refinements to GH tour slides
Private intermediate class in San Francisco
Update prerequisites to reference GitHub platform-specific installers

Update Windows and Mac OS X installation instructions to point to
windows.github.com and mac.github.com and emphasize the inclusion
of the OS specific GUI apps included.
Merge pull request #168 from github/github-tour-slide-deck

Add first draft GitHub feature slides
Add July 2013 Free Class notes
Add initial July 10 Online Foundations Class notes
GitHubGuides YouTube links
Update July Foundations Online Class Notes

Add day 2 CLI, fix formatting.
Finish July Foundations Open Enrollment class notes
Removed leading tab that was preventing gh-pages build
stljug july-2013
Deprecated in favor of http://teach.github.com/articles/shell-prompts/
whoops, stljug not ejug
Merge branch 'gh-pages' of https://github.com/github/teach.github.com into gh-pages
Create new Gemfile.lock to reflect latest Gem releases

Gem update of interest includes Jekyll 1.1.0, leaping
from the 0.12 release previously reflected in the
Gemfile.lock.
remove old vendor/cache for new jekyll stuff
have to ignore gems now because of jekyll 1.0 being cached
Add placeholder/temp text to otherwise empty slide

Jekyll processing of slide markdown with only a
Liquid capture block fails to correctly build.

Temporary fix is to include placeholder text
prior to the {% capture notes %} line.
Update HydeSlide Plugins submodule with UI/functionality fixes

Version rev includes CSS update to fix horizontal scrolling on
overflowing notes of TOC.

Fixes chapter item highlighting in conjunction with active slide
highlighting for easier and quicker visual indicators.