- rename atrim to atrim.fsm
 - Terminology - redundant state is now dead state
 - allow to remove only unreachable or only dead states (see ./atrim.fsm -h)
 - remove namespace

 - rename atrim to atrim.fsm
 - Terminology - redundant state is now dead state
 - allow to remove only unreachable or only dead states (see ./atrim.fsm -h)
 - remove namespace

I do this change because of this issue:
http://stackoverflow.com/a/12748882/2654282