fix nfe4web requirements
fix adjustment tax
line item fee
new version
Merge remote-tracking branch 'marcosteixeira/spree_nf4web'

Conflicts:
	app/controllers/spree/api/nf4web_controller.rb
	app/views/spree/api/nf4web/api_order.v1.rabl
	lib/spree_nf4web/orders_finder.rb