import private keys from Bitcoin Wallet backup files
Merge branch 'import-bitcoin-wallet-keys' of github.com:johnzweng/wallet into johnzweng-import-bitcoin-wallet-keys
moved two methods from Utils -> EncryptionUtils
Merge branch 'johnzweng-import-bitcoin-wallet-keys'
v1.2.6
ability import backups from Schildbach wallet files
bugfix in buy order dialog
v1.2.7
reworded description
moved initialisation to onResume