Port Updated qrcode decode / detect from zxing-cpp

[hschimke]

Work is ongoing in: https://github.com/rxing-core/rxing/tree/port_cpp_qrcode

Fixes #25

[hschimke]

Some reorganization of code is also being done, as it fit within the scope of the port well.

[hschimke]

Progress report:

• Primary port is complete
• Port of tests in progress
• Taking slightly longer than expected due to outside factors.

[hschimke]

closed by #30