Fix incorrect installation command for Mac.
Add support STM32F103RC chip
fixed reset()/resetStopOnReset() function because of cortex_m.py changed
using Cortex-M default function for reset()/step()/resetStopOnReset()
added use 2to3
Merge pull request #75 from matthewelse/master

Python 2 to 3 conversion as part of setup.py
Merge pull request #74 from wjzhang/master

Add support for STM32F103RC chip