Merge pull request #27 from pagles/master

Handles unexpected error codes.

Author: geeknam

gcm/gcm.py

@@ -144,6 +144,9 @@ def make_request(self, data, is_json=True):
                 raise GCMAuthenticationException("There was an error authenticating the sender account")
             elif e.code == 503:
                 raise GCMUnavailableException("GCM service is unavailable")
+            else:
+                error = "GCM service error: %d" % e.code
+                raise GCMUnavailableException(error)
         except urllib2.URLError as e:
             raise GCMConnectionException("There was an internal error in the GCM server while trying to process the request")