update for github language detection again

bpaste

@@ -22,8 +22,9 @@ else:
     f = open(args.filename, 'r')
     args.filename = os.path.basename(args.filename)
     if args.language is None:
-        r = requests.get('https://gist.github.com/languages/detect', params={'name': args.filename})
-        language = r.json()['languages'][0]
+        r = requests.get('https://gist.github.com/detect_language',
+                params={'filename': args.filename}, headers={'Accept': 'application/json'})
+        language = r.json()['language']
         args.language = language.lower()
 
 content = f.read()