shaders are hidden by default
shaders now have 'close' button
added shader stuff
Shader toggle function improved. No more onclicks in HTML.
display is once again optimal, when playing game.
realized game config can become level-specific.
making levels
got rid of tick / requestAnimFrame. Changed GLcanvas from prototype to constructor-based.
Shaders are now all indexed into an object, held within the GLcanvas context.