z80dma : fixed buffer overflow. Fixes altos5 and wmbullet floppies.
removed no-longer-needed asserts from z80dma
removed identical romsets
Add a TEA1002 color encoder device and use it for the Aquarius. It might
make sense to make this a direct descendent of the palette_device
instead.

Color information based on TEA1002 datasheet.  [Dirk Best, nitrofurano,
Bruce Abbott]
Merge https://github.com/mamedev/mame