Use the 2-2-stable branches, not masters

Fixes #74
set InvoiceID to order number

Fixes #76
Remove database cleaner and simplecov dup dependencies
Use correct asset paths
Use correct asset paths in installer
Use correct asset paths in installer
Add german translation

Fixes #79

Conflicts:
	app/controllers/spree/paypal_controller.rb
Stop coffee_script and sass warnings
Update README.md to point to 2-2-stable branch

Fix: Branch 2-2-stable should be pointing 2-2-stable instead 2-0-stable
create a new payment when refund successful

this new payment is an offset of the original payment, source is the actual payment

fixes #82
Fixes #83

Conflicts:
	app/models/spree/gateway/pay_pal_express.rb
Pass cancel token back to checkout

Reasoning: as it is we lose the information that an order has been canceled. Better to keep it around so programmers can customise post Paypal failure cancellation experience.

Fixes #63
allow to intercept line items and request details

allows to change the paypal request by overriding the methods in a controller decorator. e.g. to allow digital items.

Fixes #86
Merge pull request #2 from spree-contrib/2-2-stable

2 2 stable merge