- Fixed OGL ES2 built-in materials:
 * Added missing materials.
 * Improved compatibility with materials from other drivers (shaders are mapped mostly 1:1).
 * Improved performance.
 * Improved portability.

Lighting and fog are still unsupported except normal and parallax map materials.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code@4900 dfc29bdd-3216-0410-991c-e03cc46cb475