Basic (static, local) GPIO functions, bump version to 1.3

Signed-off-by: chuljin <rfbee@chuljin.net>
Merge branch 'master' of https://github.com/chuljin/RFBee
Merge branch 'master' of https://github.com/chuljin/RFBee
move setGPIO() to rfBeeInit since it's not actually CCx-related

Signed-off-by: chuljin <rfbee@chuljin.net>