first version of bits of gold branded wallet
fix in export pdf for non-ascii
bits of gold wallet integration
Merge branch 'bitsofgold'

Conflicts:
	public/mbw/build.gradle
backup util to restore private keys locally without android
v1.2.0
updated build tools versions (bump to gradle tools 0.9)
fixed minor lint warnings
merge bitsofgold + backuputil from master