Merge pull request #483 from code-dot-org/test-fix

Use active record entry instead of int to handle new script levels in te...
add functionality to automatically save some images to gallery
define assert_creates and assert_does_not_create so we don't nest assert_differences forever
checking in a oneoff query for activity from SF teachers
Automatically built.
Automatically built.
Automatically built.
Work in progress on refactored signup/in page views.
add more jigsaw levels
Polishing up the new signup/signin UI.
Review feedback from Laurel.
public gallery list page
Automatically built.
Merge pull request #487 from code-dot-org/jigsawProgression

add more jigsaw levels
Automatically built.
add total number of saved images to gallery
Automatically built.
Merge pull request #488 from code-dot-org/signup

Refactored signup/in page views.
Improve password error messaging on signup.
cr feedback from toby: fix spaces in css and duplicate font-size