Minor naming improvements
Minor naming improvements

"Paint" is being used to refer to both the user changing tiles and
rendering the canvas. Renaming rendering the canvas to "draw".

Making use of Lv1 more consistent in function names.

cgmb/Diversibee,arowens/Diversibee,cgmb/Diversibee,arowens/Diversibee,jvamosi/Diversibee,jvamosi/Diversibee