Fixed a python 3.0 string format issue. Switched to hashlib since md5 is deprecated.
Fixed a python 3.0 string format issue. Switched to hashlib since md5 is deprecated.

gerasim13/flask-cache,thadeusb/flask-cache,alexey-sveshnikov/flask-cache,j-fuentes/flask-cache,thadeusb/flask-cache,kazeeki/mezmorize,ordbogen/flask-cache,ordbogen/flask-cache,j-fuentes/flask-cache,alexey-sveshnikov/flask-cache,gerasim13/flask-cache,kazeeki/mezmorize