nRF51822 Pins

Creating pins for the RBL nRF51822 Board
Added RBL nRF51822 Support

Added support for the nRF51822 Board by RedBearLab.
Moved include for nRF51822

Moved the include into the right file.
Added Board

Added RedBearLab nRF51822 and instructions to the readme.
Updated instructions

Added information about including SPI.h
Revert "Updated instructions"

This reverts commit 904569278d10d717a177dfc8eab1f6b385b96629.
Updated comment

Updated comment to reflect including SPI.h on the RBL nRF as well.
Merge pull request #115 from sieren/master

Added support for RedBearLab nRF51822 Board