Dust off scroll buffer & tile buffer managers

[tehKaiN]

I guess this part of code is bugged and rotten since it wasn't touched for a long time.

needed for Last-Minute-Creations/openFire#5

Scroll buffer:

• Migrate to taglist syntax
• On scroll buffer, check if bobs are drawing correctly where bitmap folds (interleaved)

Tile buffer:

• Migrate to taglist syntax
• Fix initial draw
• check if tiles are redrawing properly on draw margins (checked Y for AMiner)
• fix garbage which appears during x-movement on Y wrap line - wasn't ACE's fault

[tehKaiN]

I've added two points to checklist from my old trello board

[tehKaiN]

Scroll buffer folds in a wrong way - it omits first line, thus bob blitted on wrap is displayed without one line

[tehKaiN]

Everything's looking fixed!