Clean up

[supermarin]

This PR shouldn't change any SDK behavior, it just cleans up redundant code and utilizes Objective-C conventions.

TODO: need to rebase & squash some of the commits

Things addressed in the PR:

• Clang format definition for consistent syntax. This changed spacing around pointers, etc. Style is closely matching Apple's frameworks.
• Removed @synchronized locks around atomic properties. This is happening by default, no need to override property getters. TODO: replace locks with GCD queues where needed. I believe some of these could be made nonatomic.
• Consistent documentation with /// style. Even Apple is inconsistent and keeps changing the AppleDoc format. /// style works inline for properties, and it's harder to mess up than /* ... one when there's multiple lines and parameters.
• Removed direct pointer access in favor of properties. It's not needed to declare ivars since Objc 2.0.
• Code is aligned to 120 columns. This is the unofficial Objc line length, due to giant selectors.
• Removed redundant interface declarations from OT to LS. If a type conforms to a protocol, there's no need for copying all the methods in the implementer's .h file.
• Suppressed some warnings that were propagated to client projects

Follow ups:

• Use 3 letter prefix. I propose LST
• Wire up clang format on CI, report failure if it's not clean
• Make a matrix on Travis to run in parallel integration with Swift, Objc and clang format

[bhs]

@supermarin I think this is ready to merge from my end... anything you're still intending to do here?

[supermarin]

nope, go for it