tests(queue, worker): add unit tests
refactor(worker): use async
feature(queue): add unique mode
refactor(queue): set the last element with negative offset
refactor(redis-driver): unique pop assumes better integrity
feature(timeout): add a timeout for the execution of the action
fix after comments
fix after comments
refactor(readme): add options
refactor(options): unique as queue option
Merge pull request #8 from JBustin/master

Merge to origin repo