Basic drawing operatoins
Example of drawing a picture
Move `Color` to `Allegro.Graphics`
Switch naming conventions again.

The "aways qualified" mode is not very nice when you use the modules:
  * using names that are close to the C version helps user
  * all the qualifiers make things more cluttered
  * one can't make "combining" modules due to name clashes
Bind the many functions for transforming bitmaps while drawing.