Added call to prepare_for_document in t_spliner in order to avoid not active grips that made the L2 minimization fail.
                Activated code to set corner vertex positions.
                Added an A configuration that uses t-spline libraries with an A suffix.
                Changed accoringly package.bat.

[git-p4: depot-paths = "//ReForm/ReForm/main/CoMISo/": change = 12741]