swift3 + rxswift 3 beta 2

add support for swift3 + rxswift 3 beta 2

Drag and Rotate

Adds dragging and rotating, restructures how gestures are represented internally. Still needs lot of work on the OSX side but already features few gestures

rxswiftcommunity transfer #2

Merge pull request #5 from icanzilb/master

* 0.1.5 change copyright and ownership

rxswiftcommunity transfer

Merge pull request #4 from icanzilb/master

* 0.1.4 is hosted at the rxswiftcommunity github