[api] Throw error object if ok == 0

If "ok" is 0, throw an exception instead of returning the decoded
json.  The exception it returns stringifies nicely by default and
exposes the response object as an attribute (.response) on the exception
instance.  You can also access the details of the decoded json by
examining the .content attribute

glitch/api.py

@@ -3,6 +3,18 @@
 from compat import json
 
 
+class GlitchError(ValueError):
+    """ Wrapper for errors to be thrown if content['ok'] is 0 """
+    def __init__(self, content, response):
+        self.content = content
+        self.response = response
+        super(GlitchError, self).__init__(self.error)
+
+    @property
+    def error(self):
+        return self.content['error']
+
+
 class GlitchAPI(object):
     DOMAIN = 'api.glitch.com'
     BASE_PATH = '/simple'
@@ -38,8 +50,13 @@ def _postprocess(self, response):
         response.raise_for_status()
 
         # For some reason, this doesn't work.
-        #return json.load(response)
-        return json.loads(response.content)
+        #content = json.load(response)
+        content = json.loads(response.content)
+
+        if content['ok'] == '0' or content['ok'] == 0:
+            raise GlitchError(content, response)
+
+        return content
 
     def _uri(self, path):
         """