Various additions and fixes

Additions:

Offset-per-tile for modes using 8x8 tiles (Tetris Attack, Contra 3,
Chrono Trigger, Lufia II, ...)
Mode 7 variation with graphic priority bit (Contra 3, ...)
Mode 7 flipping attributes
Mode 5/6 in true hi-res (Secret of Mana, ...). Includes Interlacing.
Small Sprites
....

Fixes:

Windowing where one window fully overlaps another (Megaman X, Final
Fantasy IV & V, ...)
Sprites using tile numbers greater than 255 (Actraiser?, Contra 3, ...)
HDMA Single Write Single Register to PPU (Final Fantasy V, ...)
Mid-frame HDMA (Super Ghouls 'n Ghosts, ...)
....