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.
removed NFC permissions since it's not necessary
Merge pull request #81 from WACOMalt/master

Added NFC support for bitcoin: URI (untested yet)