0906 callActivity timer
0907 handle interrupt
Merge branch 'ylc'
0907 history limit 50
Merge branch 'master' of https://github.com/ylc1218/Qrapp2

Conflicts:
	src/nthu/qrcode/qrapp2/sip/CallReceiver.java
0907 modify database connection
Merge branch 'lowlow'

Conflicts:
	src/nthu/qrcode/qrapp2/fragment/ContactFragment.java
0908 contact search