Fix font-awesome
Icon and deprecation fixes.

Conflicts:
	Gemfile
	app/views/spree/admin/shipments/edit.html.erb
	app/views/spree/admin/shipments/index.html.erb
	app/views/spree/admin/suppliers/edit.html.erb
	app/views/spree/admin/suppliers/index.html.erb
	app/views/spree/admin/suppliers/new.html.erb
	spec/features/admin/properties_spec.rb
	spec/features/admin/relations_spec.rb
	spec/features/admin/return_authorizations_spec.rb
spec fixes.
Begin linking suppliers to variants rather than products.
wip