Synthesis, molecular structure and supramolecular chemistry of a new nickel-quinoxaline dithiolate system [Bu4N]2[Ni(6,7-qdt)2] (6,7-qdt = quinoxaline-6,7-dithiolate) and comparison of its electronic and electrochemical properties with those of [Bu4N]2[Ni(qdt)2] (qdt = quinoxaline-2,3-dithiolate)