begin to collect camera data
separate models
edit UEntropyCollector
add UEntropyMic
add log
Merge branch 'develop' into feature/use_xrandom
use a larger mic recorder buffer size to reduce data rate
add motion entropy
edit user entropy collector
randomly select bytes from entropy source
use pause and resume for UEntropySource
add password dialog to uentropy
upgrade bitherj
check network type then start peer
add XRandom check box
Merge branch 'feature/use_xrandom' into develop

Conflicts:
	bither-android/AndroidManifest.xml