dont break ox.API subclasses

ox/api.py

@@ -8,14 +8,19 @@ import gzip
 import StringIO
 import urllib2
 
+from . import __version__
 from .utils import json
 from .form import MultiPartForm
 
-__all__ = ['API']
+__all__ = ['getAPI', 'API']
 
-def API(url, cj=None):
-    class API(object):
-        __version__ = 0.0
+def getAPI(url, cj=None):
+    class A(API):
+        pass
+    return A(url, cj)
+
+class API(object):
+    __version__ = __version__
     __name__ = 'ox'
     DEBUG = False
     debuglevel = 0
@@ -105,5 +110,3 @@ def API(url, cj=None):
             form.add_field('data', json.dumps(data))
         return self._json_request(self.url, form)
 
-    return API(url, cj)
-