WildbitsK2 animation using memory text and custom fonts

Demo of using custom fonts and memory text to animate some videos. Video frames are encoded to derive 4 custom font sets and a 256 palette that is used for all frame reconstructions. Each frame is a 80x60 arrangement of characters, where each character is pointing to one of the 1024 glyphs and two colors (foreground and background) from the palette. Memory Text is a Core2x feature that allows memory to be used for the 'text matrix' and 'color matrix'. With the classic/legacy text feature all text information is loaded into a dedicated I/O page. Memory text allows double buffering of the text screen, which is being done here.