Show flash sale overlay once per session
FIx colorbox scrolling problems.
Merge pull request #542 from leapmotion/holiday-update

Dumbo merged after a successful deploy :kiss:
150 apps
Merge pull request #543 from leapmotion/holiday-update

Update text from 140 to 150 apps
Redirect to new /offer-terms page
Merge branch 'master' into holiday-update
Don't show flash sale modal on phones