Added support for NFC bitcoin URI handling

Added NFC to the bitcoin URI intent, and StartupActivity now also checks
for NFC event.
NFC bitcoin: URI events should now be handled in entirely the same way
as a clicked link.
Added support for NFC bitcoin URI handling

Added NFC to the bitcoin URI intent, and StartupActivity now also checks
for NFC event.
NFC bitcoin: URI events should now be handled in entirely the same way
as a clicked link.
import Bitcoin Wallet private keys from new protocol buffer based backup file format
better check for compressed keys
don't finish InstantWalletActivity on scan result
(allows the user clicking back to scan the next cold storage)
Merge pull request #84 from johnzweng/coldwallet-back-handling

don't finish InstantWalletActivity on scan result
Merge branch 'update-schildbach-import' of github.com:johnzweng/wallet
into johnzweng-update-schildbach-import
removed NFC permissions since it's not necessary
Merge pull request #81 from WACOMalt/master

Added NFC support for bitcoin: URI (untested yet)
Merge branch 'johnzweng-update-schildbach-import'
Merge remote-tracking branch 'origin/master'