[cyvlfeat] Use pypi as source

dependencies/cyvlfeat/meta.yaml

@@ -5,8 +5,9 @@ package:
   version: {{ version }}
 
 source:
-  git_rev: v{{ version }}
-  git_url: https://github.com/menpo/cyvlfeat.git
+  fn: cyvlfeat-{{ version }}.tar.gz
+  url: https://pypi.python.org/packages/bb/f7/7243e001f6a524cef8ddd32e45a5c60984c2cdb39d267bfe11b03701b3d8/cyvlfeat-{{ version }}.zip
+  md5: 3c629cafe97ff55b698241197eefd7c3
 
 build:
   number: 0