DRY up caching code. There were three almost identical. Now one.
Adjust some timing values. Fix some unused var warnings.
Typo
Update all to latest Elixiri 1.0.0-rc1 and Phoenix 0.4.0
Fix handling of static images to match Phoenix defaults. Update Gittip to Gratipay (new company name).
Fix bug in Cache.get
Merge branch 'release/20140831a'