UI - 연결 관련 수정

   - javadoc 생성
Merge branch 'UI' of https://github.com/Poturns/Blink.git into UI

Conflicts:
	BlinkLibrary/src/kr/poturns/blink/external/ConnectionFragment.java
	Demo/FitnessApp/src/kr/poturns/blink/demo/fitnessapp/HeartBeatService.java