minor clarifications and edits for windows installfest

Conflicts:
	sites/installfest/windows.step
clarified local data does not go to heroku
fixed diagram to show that show and edit read from the db
Update create_and_deploy_a_rails_app.step

spelling fix
Merge branch 'windows-installfest' of https://github.com/annaswims/docs into annaswims-windows-installfest
Revert ansicon to use the Github download to avoid broken link
Remove 'git seems stuck' and 'diagnostics for rvm' pages from installfest

* The "what to do if git seems stuck" page is outdated, a little
strange, and windows-specific.
* The 'rvm diagnostics' page doesn't provide students with much
information, it just gives TAs a place to start.

In both situations, it's probably better to just leave it up to the
judgement of the TA.
Remove unreferenced images from installfest, moved rest to img/
Updating ansicon link for 1.61 (again)
do everything in the railsbridge directory
Change `topic.votes.length` to `topic.votes.count`

`.length` will do a `SELECT "votes".* FROM "votes"` where `.count` will perform a more efficient `SELECT COUNT(*) FROM "votes"`
[Retro 2013-06-01] Add link to "get a sticker" step for those who have completed installation before installfest
Update ubuntu.step

Clarify how to get to Profile Preferences
Update windows_colors.step
Merge branch 'patch-1' of https://github.com/kejadlen/docs into kejadlen-patch-1
Merge branch 'patch-3' of https://github.com/kejadlen/docs into kejadlen-patch-3
Add links to Google Drive presentations
Test was failing under Ruby 2.0. Removed single quote since we should not care about entity encoding in this test.
Update loops.step

Emphasizing the message about exponentiation breaks the `**` characters.
Update variables.step

Be clear that you need to run `irb` again after exiting it in the previous lesson.