Project2: Update comment
Project2: Figured out setting array uniforms.
Something like oglplus::uniform.hpp::UniformTpl::operator =
function is non-templated (Class template parameter T is used, not a function template). The parameter in a
'Uniform<Mat4f>(prog, attr) = blah' call will be just Mat4f.
The assignments accepting std::vector of things are
eg. UniformSpecOps::Set.