DESFire emulation support: Bug fixes, improvements and updated LibNFC test code

[maxieds]

@fptrs @david-oswald This pull request incorporates several smaller bug fixes and improvements. The best reasons to merge this code are found in the updates DESFire documentation:

• Better PM3 compatibility including AES-128 authentication (see here)
• More configurable PICC header information via the Chameleon terminal (see here)
• Improvements to PM3 hf mfdes info responses including accurate human readable output (see here)

Note that the new documentation page is discussed at the end of PR #319. It provides documentation for the custom build targets that are not auto generated by the GitHub scripts for users. This information is missing from the documentation pages and is not easy to locate only by reading the Makefile in the Chameleon Mini firmware directory.

[maxieds]

That was quick!

[maxieds]

@fprts Where are the new automated firmware builds located? From this script, it looks like they should be found in a directory of the repo top level called FirmwareBuilds. I cannot locate them myself. Please help.