Set time limit for items in the memcache key cache
Set time limit for items in the memcache key cache

This is in reference to issue #116.

graphis/Stash,jaredtking/Stash,andrerom/Stash,graphis/Stash,theUniC/Stash,localheinz/Stash,alawnchen/Stash,localheinz/Stash,bankiru/Stash,bankiru/Stash,alawnchen/Stash,tedious/Stash,AndrewCarterUK/Stash,tedious/Stash,andrerom/Stash,AndrewCarterUK/Stash,theUniC/Stash,csburton/Stash,jaredtking/Stash,csburton/Stash