Develop more state machines for PP components (reactor, filter...)

[allpowerlabs]

More information on state machines:
http://en.wikipedia.org/wiki/State_machine
http://www.drdobbs.com/cpp/184401236
http://www.arduino.cc/playground/Code/FiniteStateMachine

Ragel could be interesting...?:
http://www.complang.org/ragel/