Migrate ErgoMobileClient to Bluegiga BLE112 (BLE4.0)

This project changes the existing ErgoMobileClient app (developed in previous project https://www.freelancer.com/projects/mobile-phone/project-for-zubairbh-12765508/) Currently ErgoMobileClient uses BT2.0 (via Bluegiga WT12) connection to communicate with DigiStick hardware. This project migrates the system to Bluegiga BLE112 and BLE4.0. It contains following tasks: 1) Implement BLE112 application that opens UART connection to DigiStick MCU and mimics the old commands, so that no changes are required to digistick firmware. 1a) Also use one BLE112 GPIO pin as connection indicator. LOW when no connection, HIGH when ErgoMobileClient is connected to BLE112. 1b) Add some way for Android app to identificate that BLE112 device really is the DigiStick. ClassName or something, your call. 1c) Add version number to BLE112 app, so that Android app can see it and knows the protocol version used. In case we need to update BLE112 app in the future. 2) Change ErgoMobileClient Android app so it uses BLE4.0 instead of BT2.0, and connects to the DigiStick with BLE112 module. 3) Test that all the existing functionality works with real hardware. 3a) This requires soldering few wires between BLE112 eval board and DigiStick. See attached pinout doc. Project milestones are described in attached document.