Renamed WorkOrder to Need

* from IM with Wayne: "we should change that route from work_orders to needs at some point"
Merge branch 'jm/rename_work_order' of https://github.com/jmccartie/pairs into jmccartie-jm/rename_work_order

Conflicts:
	app/models/ability.rb
	app/views/needs/index.html.erb
	config/routes.rb
Merge fixes
Merge branch 'master' of https://github.com/servemoore/pairs

Conflicts:
	app/views/work_orders/index.html.erb