Polling, README.md improvments
Typo
Merge branch 'master' of git://github.com/tolgaakyuz/minwq into tolgaakyuz-master

Conflicts:
	lib/minwq.js
Hash unique keys
New back end structure. No more mutiple keys, sets and stuff lying
around. Every single queue is backed by a single redis list.
fix #3, fix #4