FATAL. ONLY UPLOADED FOR REVIEW: conversion work:
renderprepassmanager: corrects  error related to the ClearGBufferShader so folks know what the'yre looking for
shadergenglslinit.cpp: adds the  registerFeature entries for deferred features and ties them into looking for glsl code-insertion generators
deferredShadingFeaturesGLSL.cpp: first draft for converting hlsl to glsl equivalents.