Use 2-3-stable
Use spree_core ~> 2.3.0
Don't ask for shipping information

Spree gathers shipping in the address step, so it is unnecessary to
request this from paypal. This removes the prompt for a shipping address
in the paypal interface, which should be a better customer experience.

Fixes #109
Workaround for #103
Add ssl_allowed to PaypalController

Previously, when `redirect_https_to_http` was enabled, this would
redirect (or issue 426) when requested with SSL. Obviously SSL should be
allowed (if not enforced).

Fixes #105
Fixes #108
Fix undefined method-token in Paypal payment confirmation callback
Merge pull request #116 from Gigha/2-3-stable

Fix undefined method-token in Paypal payment confirmation callback
merged master and set auth to use formrausch gem
dont use all_adjustments -> adjustments. paypal error:The totals of the cart item amounts do not match order amounts.