Merge pull request #2 from jtapia/2-2-stable

Fix issue creating multiple payments
Merge pull request #3 from jtapia/2-2-stable

Avoid to create multiple payments as a paypal option
Include line_item_adjustments to send to paypal
Revert fixes related to multiple payments

This reverts commit 5610ec6136b591e8b6fab6817d549a4d42c09d0a.
Fix merge
Merge branch '2-2-stable' of github.com:jtapia/spree_paypal_express into 2-2-stable