Changes for StateMachine::Gestinanna
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0.06 - Added can(,) method
       Added overrides key for edge transition definitions
       Added Mail Form example

0.05 - Added Class::Container to make creation of new state machine 
         types (vs. applications) easier

0.04 - Corrected incorrect invocation of transtion handlers
       Convenience functions (selected_state, invalid, missing, etc.)
       More documentation

0.03 - More complete support for HAS-A relationships
       More documentation

0.02 - Initial support for HAS-A relationships

0.01 - Initial release
