Fluidstate

* bugfix: state machines of the same type was mixing their states
* support to state change notification

* support to multiple entry and exit actions
* support to transition actions (accepts multiple actions)
* support to multiple guards
* support to callables on all callbacks (entry, exit, action, guards)
* support to define states and transactions for an individual object
* support event parameters, passing them to the actions
* support to one event to choose among multiple possible transitions, based on their guards
* compatibility to python 2.4, 2.5, 2.6, 2.7, 3.1, and 3.2

Main features for this initial release:
* definition of states, transitions and events
* support to entry and exit actions
* support to guards