Improve source and coupon handling on subscriptions

Author: Manuel Huez

processout/subscription.py

@@ -652,7 +652,7 @@ def create(self, customer_id, options = {}):
             'return_url': self.return_url, 
             'cancel_url': self.cancel_url, 
             'source': options.get("source"), 
-            'prorate': options.get("prorate"), 
+            'coupon_id': options.get("coupon_id"), 
             'customer_id': customer_id
         }
 
@@ -690,6 +690,7 @@ def create_from_plan(self, customer_id, plan_id, options = {}):
             'return_url': self.return_url, 
             'cancel_url': self.cancel_url, 
             'source': options.get("source"), 
+            'coupon_id': options.get("coupon_id"), 
             'customer_id': customer_id, 
             'plan_id': plan_id
         }

setup.py

@@ -3,12 +3,12 @@
 setup(
   name = 'processout',
   packages = ['processout', 'processout.errors', 'processout.networking'],
-  version = '5.2.1',
+  version = '5.2.2',
   description = 'ProcessOut API bindings.',
   author = 'ProcessOut',
   author_email = '[email protected]',
   url = 'https://github.com/processout/processout-python',
-  download_url = 'https://github.com/processout/processout-python/tarball/5.2.1',
+  download_url = 'https://github.com/processout/processout-python/tarball/5.2.2',
   keywords = ['ProcessOut', 'api', 'bindings'],
   classifiers = [],
 )