merging sprite test changes.
Merge branch 'master' of email@example.com:markkimsal/clamdigger
Fix scrolling buffer zone.
Fixed scrolling properly
fixing up scrolling slightly.
Changed placement of test car
Altered spacing of parking lines
Updating camera test to work with newest libs.
Layer's now painting is now more self contained.
Moved around the sprite painting routines to get sprites ready for in…
…clusion into layers
Fixed math to check for sprite boundary collisions with the current l…
Trim off size of level to deal with offseeting of layer memory.
Started working on integrating the multiple layers concept into the s…
Make layer wide enough to cover 800x600 configuration.
Tweaking collision tests.
Started working on level boundaries.
Re-initial commit w/o assets dir.