Revert "ast.literal_eval -> json.loads"

This reverts commit 6d940b5c92.

copyvios/turnitin.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-import json
+from ast import literal_eval
 import re
 
 import requests
@@ -31,8 +31,8 @@ def _make_api_request(page_title, lang):
                       'report': 1}
 
     result = requests.get(TURNITIN_API_ENDPOINT, params=api_parameters)
-    # use json.loads to *safely* parse the resulting dict-containing string
-    parsed_api_result = json.loads(result.text)
+    # use literal_eval to *safely* parse the resulting dict-containing string
+    parsed_api_result = literal_eval(result.text)
     return parsed_api_result
 
 class TurnitinResult(object):