Merge pull request #28 from brendanmaguire/master

Make Python3 compatible
Correctly print blinkstick info
Release 1.1.5
Optional parameter to find_* functions to specify blinkstick class

* This allows the caller to specify another class to init for the found blinkstick(s)
* Defaults to the BlinkStick class
Added AsyncioBlinkStick class which yields to the event loops on sleeps