rst: Add highlighting for role specifications.
rst: Add highlighting for role specifications.

CMake and llvm/clang documentation, at least, use the :ref:`name` form.

 http://docutils.sourceforge.net/docs/ref/rst/restructuredtext.html#interpreted-text

hlamer/kate,hlamer/kate,sandsmark/kate,DickJ/kate,hlamer/kate,sandsmark/kate,jfmcarreira/kate,DickJ/kate,cmacq2/kate,hlamer/kate,DickJ/kate,sandsmark/kate,sandsmark/kate,DickJ/kate,cmacq2/kate,jfmcarreira/kate,hlamer/kate,cmacq2/kate,hlamer/kate,hlamer/kate,jfmcarreira/kate,hlamer/kate,hlamer/kate,hlamer/kate