bugfixes in iso14443a.c and hf 14a reader
- introduced with the big frame and parity support (commit 6a1f2d82): tag responses with len%8 == 0 were dropped  - thanks iceman for testing and finding
- after unsuccessful hf 14a reader the field stayed on. Thanks to iceman for proposing the fix.
Merge branch 'master' of https://github.com/pwpiwi/proxmark3