v0.16a: 'sound of Taito release'

- Added Following 16 playable games:

------------------+-----------------+---------+-------------------------------
Game Name | Company/System | Dumper | Info 
------------------+-----------------+---------+-------------------------------
Arkanoid Returns | Taito F3-System | Powerjaw| 
Blood Bros | Tad Corp | dump.it | 
Cabal | Red Corp | dump.it | 
Crime City | Taito B-System | | 
Darius | Taito Dual68k | J-Rom | Uses 3 screens 
Darius Extra | Taito Dual68k | J-Rom | Req Darius roms to run 
Pulirula | Taito F2-System | araCORN | More araCORN games coming soon :)
Rastan Saga | Taito | | 
Rastan Saga 2 | Taito B-System | J-Rom | 
Rodland | Jaleco | dump.it | 
Space Invaders DX | Taito B-System | malcor | Missing Pixel Layer Clear 
Syvalion | Taito H-System | J-Rom | Missing Sprite Zooming 
Taito Tetris | Taito B-System | J-Rom | Game Licensed from Sega 
Thunder Fox | Taito F1-System | | Missing line-line scroll 
Warrior Blade | Taito | J-Rom | Uses 2 screens (Rastan Saga 3) 
West Story | Datsu Alliance | dump.it | Bootleg of Blood Bros 
------------------+-----------------+---------+------------------------------- 

- YM2610 sound in:
Bonze Adventure, Crime City, Dinorex, Drift Out, Final Blow, Growl, Jigoku,
Liquid Kids, Mega Blast, Ninja Kids, Ninja Warriors, Operation Thunderbolt,
Pulirula, Rastan Saga 2, Space Invaders DX, Super Space Invaders 91, Superman,
Syvalion, Taito Tetris, Warrior Blade.

- YM2151 sound in:
Cabal, Cadash, Operation Wolf, Operation Wolf Bootleg, Rastan, Rastan Saga,
Rainbow Islands, Rainbow Islands Extra, Rodland (partial).

- YM2203 sound in:
Master of Weapons, Darius, Darius Extra.

- YM3526/3812 sound and 8-bit samples in:
Armed Formation, Terra Cresta, Terra Force.

- ADPCM samples in:
Cabal, Darius, Darius Extra, Rastan, Rastan Saga, Operation Wolf, Operation
Wolf Bootleg.

- DriftOut rotation layer optimized with fast code from Cedrick Collomb
- Toggle All/Available/Missing roms in game selector
- 6 rompaths now (3 for roms, 3 for ziproms), also configurable in gui
- Improved sprites in Master of Weapons (now playable)
- Fixed Terra Cresta sprite colours and added BG0 disable, thanks to Nicola Salmoria
for information
- Fixed Armed Formation BG0/1 colours and gfx and added layer disable bits
- Added missing BG1 layer to Terra Force and layer disable bits
- Pause option (P). When paused, scroll bigscreen games with arrow keys
- Converted the UAE 68020 code to asm and optimized it a lot (it's not as fast as
writing a 100% asm core from scratch, but it's much faster than before!)
- Fixed Elevator Action 2, no more green colour under the main sprite.
- Joystick and Sound Options in GUI