version bump

fix u8g2 example bug

neu-rah#80

fixed warnings about temp var reference return

patching teensy lack of "typeof"

final 2.5 release

bump version

doc format

menu actions can now return bool to quit menu (true=quit)

tested menus after Print derivation, PASSED

PCINT made compatible with arduino mega (Atmega2560)

and structured for wide compatibility by using arduino PCICR and PCMSKn map macros