PHP 5.3 compatibility

Merge pull request #8 from datto/master

Change callCallbacks to be 5.3 compatible

Dummy release for packagist cache

0.2.1

Fix last fix

Fix transition state consistency between before and after callbacks

The after callbacks had the already updated state instead of the one before the transition.

BC break: TransitionEvent::construct now takes the initial state as a 2nd argument.

Make state machine arguments optional

Changes in state machine and factory arguments:

• EventDispatcher as null leads to no event dispatched
• CallbackFactory as null leads to default factory used

No BC break.

First release

First release. Should be already usable though.