fix pod errors

fix spelling errors and add test

remove pods.t from MANIFEST

add .travis.yml file

work around for MRO was generating warnings on perl 5.16 and later; prepare for release

add pods test

prepare for release 0.23

remove warning

fix a couple of syntax errors

provide new method state_changed_on_call and make %state_changed private again

make some vars global so they can be accessed directly by Class::StateMachine::Declarative::Builder for performance reasons; add debugging to on_leave_state

add support for optional arguments in on_leave_state hook, also accept a method name instead of a sub

add support for on_leave_state feature

improve debugging

_statemachine_mro may be insert methods in the main state class, but mro will not look at it again so we put it twice on the search list