This app needs to be able to generate QR Codes regardless of what other
app might be installed, so zxing's core.jar needs to be embedded in this
app.
This also includes two classes which are modified versions of ZXing classes
that allow the generation of QR Codes without the Barcode Scanner app being
installed:
https://stackoverflow.com/questions/4782543/integration-zxing-library-directly-into-my-android-application
The classes are src/com/google/zxing/encode/Contents.java which is a copy
of zxing/android/src/com/google/zxing/client/android/Contents.java; and
src/com/google/zxing/encode/QRCodeEncoder.java which is a heavily stripped
and modified version of
zxing/android/src/com/google/zxing/client/android/encode/QRCodeEncoder.java
refs #3204https://dev.guardianproject.info/issues/3204
refs #2470https://dev.guardianproject.info/issues/2470
