README: FAQ: Add info about differences with other implementations.
README: FAQ: Add info about differences with other implementations.

Change-Id: Ia23b6d9b48c05333e078a24b072e2ed63729ce82
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython