[untested]SignUp: wow.such inefficient
Fix conflict
Fix Scale: Set Launch Screen
FullImage: Base of pinching, double tapping & zooming
General: Unused View controller clean up
General: Unused views cleanup
Registration refactoring - wip.
Fixed a warning in PriorityQueueTest, and some dot syntax //FREEBIE
- Also simplified the comparators
Prefix NSArray categories.

Begin process of prefixing categories on Foundation and UIKit. This
follows Cocoa best practices. This makes sense given the number of third
party libraries the project incorporates, which may include their own
colliding category method names.

Use OWS prefix on classes that may be used across apps.
Updated Travis configuration and categories guidelines.

Travis upgraded the build system including xctool.
http://blog.travis-ci.com/2014-11-03-xcode-61-beta/

Guidelines additions and Travis fix.
Pods for textSecure fork CI
Registration refactoring - wip.
Refactoring signup flow, storage, contacts.

- Signal preferences and keying material moved to the unified storage
- Set up for staging environment to try out the new APIs
- Changes in the push registration flow to send token to RP & TS
Merging in refactoring