Merge 'development' into 'master'

`development` is stable enough to merge WIP into `master`:

- Merging will tag the code at version 0.1.1
- These change are not backward compatible, and will break existing code
- GW2Kit is now ReactiveCocoa-based (RestKit has been removed)
- GW2Kit now uses CocoaPods (for better, or worse)
- To run tests, open `Tests/GW2Kit Tests.xcworkspace`
- Use `Tests/Podfile` as an example of how to incorporate GW2Kit into your own projects