Highly experimental and very assert-y, as it doesn't handle mesh
primitive / attribute type incompatibility or conversion of
loops/strips/fans to indexed meshes yet.
Should have been done in f10d74041b
already, but somehow I failed to test for this case -- if there are no
scenes (materials/textures), it doesn't make sense to print reference
count for cameras/meshes/lights (textures/images).
No functional change, just splitting them to two separate headers and
two separate tests. These will eventually become public SceneTools
APIs... once I figure out better naming.
Probably a leftover from when these dependencies were handled in a
much shittier way? For as long as I remember, enabling WITH_GL_INFO
always enabled WITH_GL and WITH_WINDOWLESSWHATEVERAPPLICATION
implicitly.