A bunch of Mac drawing updates to correct issues and improve performance. Switched to using a different (faster) method for drawing rectangles. Fixed subpixel drawing issues related to the fact that drawing occurs centered on the coordinate so adding 0.5 draws at a pixel itself instead of spanning two pixels. And related to that removing the incorrect workaround I had previously used of setting the line width to 0.5. Also added DW_DRAW_NOAA support when drawing to windows.

# Set these here to change the version for all platforms
DW_MAJOR_VERSION=2
DW_MINOR_VERSION=2