ref: https://github.com/iceman1001/proxmark3/issues/110
FIX: 'hf 14a raw' - zero lenth commands and AppendCrc14443a doesn't work well together.
FIX: 'hf 14a raw' - made clear comments and making params comparing as it should be.
FIX: 'hf 14a raw' - when selecting tag, and it failed, the PM3 device was left with antenna on. This has now been fixed as it turns off antenna and leds.