Added class properties, path, __iter__

Renamed device_ -> handle, platform_ -> handle, etc.
Renamed lib_ -> _lib
Changed version 1.0.2 -> 1.1.0 since API was extended (__iter__)
Merge pull request #1 from vmarkovtsev/master

Added class properties, path, __iter__
Moved handle property to the base class CL
Updated setup.py