Fixed issues in keypad, Genesis and various other controllers that use INPTx registers; the emulation is now much more accurate in this area.
Various 'Bumper Bash' and 'Decathlon' ROMs are marked as always having all 4 directions on a joystick enabled, since they can't be played properly otherwise.
Added 'Hunchy II' from Chris Walton (cd-w) to ROM properties database.
Codebase now uses C++14 features.