fixed mapping bug in moire.c
first working driver for Diavolino/LoL Shield
fixed langton ant for resoltuions with width!=height (my fault), also
removed those annoying 45° vectors
switch to Timer0 for wait() on LoL Shield platform
tuned moire pattern for LoL Shield
NUM_COLS and NUM_ROWS were mixed up at some places
ltnant.c: forgot to adjust index cut off, also refined the code a bit
blackhole.c: make animation resolution aware
improved spiral(...) and random_bright(...) for non-square displays
mherweg.c: adjustments for LoL Shield resolution
extended LoL Shield profile
First Person Tetris: trigger compile time error on non-square displays
added support for Arduino Leonardo (and maybe Mega1280/2560, untested)
forgot to reduce watchdog timeout after debugging
although I still don't know whether Arduino Mega 1280/2560 boards will
work, their MCUs should at least be configurable from menuconfig
default for "null joystick" in menuconfig is "no"