Update README with mention of shader compilation
Update README with mention of shader compilation

felixpalmer/render-2-texture,felixpalmer/render-2-texture,felixpalmer/tetris.gl,felixpalmer/amd-three.js,felixpalmer/tron.js,felixpalmer/amd-three.js,felixpalmer/tron.js,felixpalmer/tetris.gl,felixpalmer/amd-three.js,felixpalmer/tron.js,felixpalmer/render-2-texture,felixpalmer/tetris.gl,felixpalmer/render-2-texture