fix Account.create terms of service acceptance

The Zencoder api requires that 'terms_of_service' be '1' as a string in
order for it to be accepted.

Author: schworer

zencoder/__init__.py

@@ -1,3 +1,4 @@
 from core import Zencoder
 from core import ZencoderResponseError
 
+from core import Account

zencoder/core.py

@@ -185,12 +185,12 @@ def __init__(self, base_url, api_key=None, as_xml=False, timeout=None):
         """
         super(Account, self).__init__(base_url, api_key, as_xml, 'account', timeout=timeout)
 
-    def create(self, email, tos=True, options=None):
+    def create(self, email, tos=1, options=None):
         """
         Creates an account with Zencoder, no API Key necessary.
         """
         data = {'email': email,
-                'terms_of_service': int(tos)}
+                'terms_of_service': str(tos)}
         if options:
             data.update(options)