add compatibility with django 1.6#13

Open

dicos wants to merge 27 commits intoericflo:masterfrom

Commits on Nov 3, 2010

Obtain the memcache timeout after adding the herd timeout so values near 30 days work correctly
niran
committed

Commits on Nov 17, 2010

Remove incr and decr functions to fallback to BaseCache's naive implementations that unpack the stored integers instead of incrementing the tuple
niran
committed

Commits on May 2, 2011

Added optional version param to the CacheClass's get() method to fix
Daniel Rust
committed

Commits on Sep 15, 2011

Allow arbitrary kwargs in cache methods so they can be more future-proof
niran
committed

Commits on Oct 11, 2011

Commits on Jun 19, 2012

Add client support for username and password
grillermo
committed

Commits on Jul 15, 2013

Commits on Oct 31, 2013

Deprecated django.utils.hashcompat.sha_constructor removal
svartalf
committed

Commits on Apr 6, 2016

add compatibility with django 1.6
dicos
committed