rewrite to use after_commit callbacks, change events names, fix Activerecord ->  ActiveRecord
add `commit` method which broadcasts {create, update}_<model-name>_{successful, failed} events
fix typo [skip ci]
add rspec and rbx stdlib to Gemfiles
clarify compatibility and remove pry (breaking CI)
fix specs for ActiveRecord ~> 3.0
fix typo [skip ci]
Merge pull request #5 from krisleech/re-write-lib

Rewrite lib to use after_commit callbacks and add a commit method for broadcasting of success/failure events for create and update.