- Also fixes a few JSHint warnings in files app
- Added "global" comment on top of files app to suppress warning and
also inform devs about what globals are use
- rename action is now checked inside of ".nametext" element
- added test to ensure that display() correctly resets all actions
including the rename one
- Refactored download URL building to make it overridable
- Added download URL override in public page
- Added JS unit tests for download URL
- Added OC.redirect() method to facilitate unit testing
