Added keyboard wedge utility & changes to BLE library

Changes this release:
-Fixed a bug in the TCMP frame transmission that was not escaping the CRC bytes
-Added basic keyboard wedge to the utilities
-Changes to BLE library that improved handling of the Bluegiga serial port
-Changes to the BLE library to support the heartbeat BLE mode (kiosk mode - see below)

Please note that the keyboard wedge utility added features no heartbeat/kiosk mode. A soon to be published utility will demonstrate this capability for Tappy readers configured with the heartbeat (kiosk) firmware mode.