Make Backbone optional
Updated README
Renamed  to  in plain test model and README
Merge branch 'master' of git://github.com/alexgorbatchev/factory-castrado into alexgorbatchev-master
Error handling, closes #1
remove EventEmitter behavior - closes #2

setAssoc wasn't doing anything. trigger/once/on/off could be shimmed in
future, but no need for now
Shims for model.get and model.set on plain objects. closes #3
Don't force #create requirement. Return object right away if it does not exist
Tests for plain objects