fix TypeError for json.loads in Python 3

Author: vinta

.travis.yml

@@ -2,6 +2,7 @@ language: python
 
 python:
   - "2.7"
+  - "3.4"
 
 install:
   - pip install coveralls

dj_elastictranscoder/views.py

@@ -18,7 +18,7 @@ def endpoint(request):
     """
 
     try:
-        data = json.loads(request.read())
+        data = json.loads(request.read().decode('utf-8'))
     except ValueError:
         return HttpResponseBadRequest('Invalid JSON')