Fixes error when state column does not exists
Merge pull request #2 from jrichardlai/fixes-when-state-column-does-not-exist

Fixes error when state column does not exists
bump version
rescue all table errors
version bump
after_commit was causing changes to be empty. this assumes you want the previous state no matter what the cirucumstance
allow more control of previous_changes checks. bad assumptions in previous commit
explicit hash notation for use_previous
add a concept of aliases to the stator dsl
updates for alias in readme
fix 1.8 compatible specs
bump version
released on rubygems
update homepage
Update README.md
Update README.md
transitions should defend against invalid states when invoked explicitly
bump version
use previous with state_changed?
Add global state change timestamp