MSX2 for Analogue Pocket and Analogizer adapter v0.5.1

What's new
Analogizer support, contributed by @RndMnkIII (plasticbugs#1): use the
Analogizer adapter for video
output to an external display (RGBS/RGsB/YPbPr/Y-C) and for SNAC
controllers and a PS/2 keyboard — no dock needed. See
ANALOGIZER.md
for setup; configuration is read from Assets/msx2/common/analogizer.bin.
Faster PS/2 keyboard compatibility: reduced debounce time so
faster-clocked keyboards (e.g. Hewlett-Packard) work over Analogizer.
Installing
Unzip msx2-pocket-sdcard.zip onto the root of the Pocket's SD card,
overwriting previous files. Cartridge .rom files go in
Assets/msx2/common/.

MSX2 for Analogue Pocket 0.5.0 + Analogizer adapter support

MSX2 for Analogue Pocket 0.5.0 + Analogizer adapter support. Check Analogizer.MD file. Reduced the debounce time for faster PS/2 keyboards (higher clock rate).