references method alway returns as array
Refactor HistoryController, History(model)
project controller codes to project model, to_param added
routes updated: added project_owner scope
path fixed. (upon overriding to_param)
quick find methods added.
Merge branch 'refactor/controller-to-model'
Merge branch 'master' of https://github.com/DonutWorks/ToDo.nut

Conflicts:
	app/views/public_activity/history/_create.html.erb