glad: improved readme
glad: improved readme

valeriog-crytek/glad,bsmr-opengl/glad,aaronmjacobs/glad,QUSpilPrgm/glad,hrehfeld/glad,QUSpilPrgm/glad,dbralir/glad,QUSpilPrgm/glad,bsmr-opengl/glad,valeriog-crytek/glad,bsmr-opengl/glad,0x1100/glad,dbralir/glad,valeriog-crytek/glad,dbralir/glad,dbralir/glad,0x1100/glad,hrehfeld/glad,0x1100/glad,hrehfeld/glad,valeriog-crytek/glad,0x1100/glad,aaronmjacobs/glad,QUSpilPrgm/glad,aaronmjacobs/glad,hrehfeld/glad,aaronmjacobs/glad,bsmr-opengl/glad