Add a validate method for ActiveRecord to prevent persisting invalid states.
versions and gemsets are ignored completely now; play around with whatever you like
don't load migrations more than once when running all specs (and surpressing migration output to improve readability)
provide state.human_name (in addition to state.localized_name)
version bump to 3.0.26
Merge branch 'master' of https://github.com/ivantsepp/aasm into ivantsepp-master

Conflicts:
	lib/aasm/persistence/active_record_persistence.rb
preparing version 3.1.0
not supporting Ruby 1.8.7 anymore
Update specs to use 'expect' syntax using transpec.  Loosed gemspec to allow rspec versions greater than 2.14.x