Added config to spec_helper for clear FactoryGirl syntax
Added http:// url validation
Validating url input
Validating url input
Merge branch 'development' of https://github.com/elreplicante/sack into development

* 'development' of https://github.com/elreplicante/sack:
  Validating url input

Conflicts:
	app/models/item.rb
	spec/models/item_spec.rb