Added back a file describing how to test
Added back a file describing how to test

kkuunnddaannkk/gl-matrix,kyroskoh/gl-matrix,Drakesinger/gl-matrix,WoodMath/gl-matrix,toji/gl-matrix,nickdesaulniers/gl-matrix,sajjadt/gl-matrix,Drakesinger/gl-matrix,3D4Medical/gl-matrix,nickdesaulniers/gl-matrix,3D4Medical/gl-matrix,toji/gl-matrix,sajjadt/gl-matrix,kyroskoh/gl-matrix,WoodMath/gl-matrix,verma/gl-matrix,verma/gl-matrix,kyroskoh/gl-matrix,kkuunnddaannkk/gl-matrix,3D4Medical/gl-matrix,verma/gl-matrix