When passing a phone to a clerk to scan the barcode, if the
phone is rotated and the screen reloads it can be bothersome
or confusion. To avoid this situation, a new option is
added to lock the screen.
A menu icon is now added which defaults as unlocked. When
touched the app sets its orientation to the "natural" orientation
of the device. When touched again the sensor dictates the
orientation of the device.
This is necessary, as Robolectric 3.0 did not work
with the newer Android SDK. Further, Robolectric 3.3.2
did not like running tests at SDK 17, so this was
also bumped.
Earlier when a card was viewed it was shown in an EditView which
was disabled. This was not optimal, as the resulting text was
dimmed. To help the text be easier to read, a TextView is now
used to display the data.
In addition, the layout of the card viewing screen has been adjusted
