Merge pull request #101 from code-dot-org/test

Deploy to production
Add initial implementation of draw lines with pattern block. Still need to add code to pre-load images so lines will always be displayed on first RUN
Added image preloading
Created property to allow easy reference of line style blocks from turtle.js
Removed unneeded path references for pattern images.
Add "set line style" block to turtle/artist app
Merge branch 'staging' of https://github.com/beezwaxz/code-dot-org into staging
Merge branch 'staging' of https://github.com/code-dot-org/code-dot-org into staging
migration to generate usernames for existing users that don't have one
Merge remote-tracking branch 'origin/master' into staging
Merge branch 'staging' of https://github.com/code-dot-org/code-dot-org into staging
whitespace and other minor cleanup for patter_line_style block implementation
Fix path and add comments to logrotate configuration.
Add logrotate ERB processing to Rakefile build scripts
Fix links to dashboard UI tests
Fix links to blockly tests
clean up a bunch of prize stuff -- delete some controllers\views that are already inaccessible, stop sending an outdated mail on the completion by the 15th student, stop setting User.prize_earned, don't link to prize page unless you have already redeemed prizes, remove unused partials
merge code-dot-org staging

Merge branch 'staging' of https://github.com/code-dot-org/code-dot-org into staging
Merge remote-tracking branch 'refs/remotes/origin/staging' into staging
whitespace fix and minor cleanup for line style block
Add some extra parameters to logrotate configuration