Added Scalaz modules
Wrap native event casts in UndefOr[]
Added runStateIOF
Refactoring: Stop importing js._
Added type aliases for a few oft-used event-node combinations
Added ComponentScope.stateIO
SyntheticEvent now covariant
SyntheticEvent.dragEvent added
Added {preventDefault,stopPropagation}{F,IO}
Added component state modStateIOM, tweaked runStateIO*
Added ComponentStateFocus
Revised how optional callbacks are handled
modState() now only stores the new state if it's changed.
HTML5 attributes for drag-and-drop.
Added modState{O,U}
Allow composition of state modifications and callbacks.

Previous strategy of transforming everything into effects fails because
React's .setState isn't applied in the same scope.
Scalaz 7.1 to RC2
Added ability to run & lift normal StateT
Added all state methods to the ReactS.Fix[S] helper
Scalaz doco & example (minimal)