dependency update [Fixes #147]

Conflicts:
	spree_paypal_express.gemspec
Set session to nil explicitly since callback has been removed. [Fix #128]
Changing to order.payment? since order.payment was removed
Check for presence
Fixes #84
Merge pull request #153 from Urquilla/2-0-stable

2 0 stable
Merge pull request #145 from davidlibrera/1-3-stable

1 3 stable
Updated Spree reference to match 2-0-stable branch
Add missing translation that triggers error 'translation missing: en.order_processed_successfully' after successful paypal purchase
Merge pull request #163 from godaddy/2-0-stable

Minor version and locale fixes
Upstream changes