Fixes for Issue #4 

This pull request contains fixes for https://github.com/DroneD/droned/issues/4

A new file containing the reactor adapter is in lib/kit/reactor.py. 

config.py was changed to remove the platform detection and move it into reactor,py, as well as reference the new kitt.reactor file.

This is confirmed working as checked in on Centos 6.2 and Fedora 17.