updating version to 0.1.8 after successful tests with UDOO
DigitalPin input implemented and tested on RaspberryPi
atexit to Ghost. And a .vimrc the the project.

.vimrc will prevent \t and 4-spaces problems, and traling-white-space
Organizing ṕingo directory
AutoDetection
Test for WrongPinMode on pin.get()
Started documentation
changed OUTPUT to OUT, INPUT to IN: shorter and compatible with RPi.GPIO convention
Merge branch 'master' of https://github.com/garoa/pingo
bumped version
moved Udoo example to udoo/examples/
added contributing chapter to docs
added contributing.rst
minor edits to contributing.rst
minor fix to contributing.rst
started working on Arduino Firmata driver
Merging work from Ramalho and Vido
merging work from Vido and Ramalho
Fixing test. Using the new pingo.OUT instead of pingo.OUTPUT
Detection for PcDuino vs. Udoo