Set version to 1.5.
Merge branch 'master' into develop

Conflicts:
	VERSION
Go to 2.0.
Improved enums.
Fixed rotation issues. Reworked ledges.
Junk.
added toggleOpenView method.
Fixed examples to work with new code.
Changed delegate behaviour and introduced delegateMode to control it.
Fixed example project to handle delegate changes.

Also: cleaned up here and there.
Reworked IIViewDeckControllerDelegate and it's interactions.
Cleaned up IIViewDeckController delegate even more. Reworked internals.

Removed a lot of duplicate code and sanitized where necessary.
Introduced the concept of sides: this will allow us to add a vertical mode too, later.
Added methods to "bounce" left/right view, with delegate methods. Similar to the iOS 5 camera button tap-to-bounce from the lock screen.
Added buttons to trigger left/right bounce. 
Implemented bounce delegate methods in demo.
Bounce animation (CAKeyframeAnimation) requires QuartzCore.framework.
Reworked bouncing value calculation to allow adjustability (duration, max bounce distance) and added protection against multiple bounces and inadvertent hiding of the non-center views when subsequent actions have made that undesirable.
Panning in the middle of a bounce animation is now handled gracefully.
Added damping factor zeta as method argument. Added a bit more documentation.
Improved appearance situation.
fixed some appearance issues.