Major Update to API 1.0.5

- Only showing one card at a time
- Using the new ScanActivity and the Android Intent system to perform
the card scanning
- Removed the help instructions from ReaderActivitySample since the
API's ScanActivity itself now has help instructions
- Adding a splash screen to ensure the user can't interact with the
application before the session is initialized
- New share this app buttons at the bottom of the activity showing scan
results