README: Add links to individual directories (ports, etc.)
README: Add links to individual directories (ports, etc.)

Change-Id: Ifd854edfb83b689dd8eb0549c2997cd3be39dcdc
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

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