changed to 2-3-stable. removed attr_accessible macros as it now requires rails 4.1 and that does not allow using attr_accessible
changed version info, and now adds dependency of activemerchant_patch_for_china
new version of spree used different paths for assets, so I changed accordingly
* changed version from 2.2 to 2.3, to reflect the fact this version corresponds to spree-2-3-stable
* changed routing config, because spree 2-3-stable uses Rails 4.1 and it required some changes
* changed the usage of "attr_accessible" to use strong parameters
* fixed some syntax error in spec/features/alipay_spec.rb (although the spec doesn't run yet)
* fixed issue in the decorator code where it can't deal with the service_url already including query parameters
* added tons of debugging prints (all commented out though )