Dane

• RxCocoa revamp, enables easy delegate wrapping rx_delegate.observe("scrollView:willDisplayCell:")
• Adds reactive data sources
• RxDataSourceKit - automatic animated updates from streams
• Removes AnyObject constraint from Table/CollectionView array subscription methods
• Adds concurrent dispatch queue scheduler
• Adds skip operator with count and time interval
• Renames Subject to PublishSubject
• Lots of new playgrounds
• New examples in example app

437 unit tests total
154 files changed, 8386 insertions(+), 2222 deletions(-)