Follow cl-gsl bd1929a and b0b9dfc: objects from reflection, consistent names
PROGRAM-VERTEX-INPUTS, PROGRAM-UNIFORMS, PROGRAM-RESOURCES and
PROGRAM-BINDINGS give structures with readers, and the examples show
them. DEFINE-VARIABLE, DEFINE-MACRO, PROGRAM-SHADER-NAME,
TEXTURE-TYPE-SHAPE and FORWARD-REFERENCE-WARNING replace the old names,
PACK-UNIFORMS takes keywords, and &UNIFORM and &SHARED are cl-gsl's own
symbols. CI runs SBCL only. Home says that clsl is replacing cl-gsl.
