Support unlocking deadlocks with setnx/getset#4

Merged

wallace merged 5 commits intowallace:masterfrom miyagawa:master

Jan 28, 2013

+44-3

Commits on Jan 10, 2013

relax resque dependency
miyagawa
committed

Commits on Jan 21, 2013

Commits on Jan 22, 2013

fix link in the comment
miyagawa
committed

Commits on Jan 23, 2013

Added spec to test setnx/getset unlock expired lock behavior
miyagawa
committed