let's start to work under v0.12
[Compatibility] Fixed compatibility with trollius 0.4 (asyncio backport).
Code style.
Let the user decide what logging formatter/handler he or she want to use.
Worker now uses its own logger.
Merge pull request #24 from cocaine/fix-compat

Fix compat with Trollius.
it works with an application
Merge remote-tracking branch 'origin/v0.12' into v0.12
Work in progress
Update setup.py
more neat & tidy repo
Yay! Python3 works!
Implementation was moved in detail package.