fix absolute path in makefile
Merge pull request #61 from lian/fix_absolute_path_in_makefile

fix absolute path in makefile
Initial commit for PowerTowerRX target.
Modifying the buzzer, simple high or low.
Moving the BTN to SCL so a normal jumper can be used to enter BIND mode if used as TX.
Merge pull request #62 from readerror67/development

Initial commit for PowerTowerRX target.
Add PowerTower RX into dialog.