remove uneeded animated parameter

Since the user is supplying an animation transition for
the operation, it can safely be assumed that the user wants
the transition to be animated.
add usage section to README
Merge branch 'master' of github.com:stepanhruda/STPTransitions
really add usage section to README
disable default back gesture as it current breaks reverse animations
add support for reversible transitions
Add support for providing custom view transition animations without subclassing STPTransition
Merge pull request #1 from shopkeep/view-transition-animation-support

Add support for providing custom view transition animations without subclassing STPTransition
add convenience method for custom UIViewController containment
Merge pull request #2 from shopkeep/view-controller-containment-support

add convenience method for custom UIViewController containment
Merge pull request #5 from shopkeep/master

Add some basic docs, animation class, child controller transitioning