This work was supported in part by the 2214-TUBITAK (Scientific and Technological Research Council of Turkey) Programme, the Scientific Research Projects Coordination Unit of Istanbul University under Project No. 46811, the European Community FP7 Capacities-Integrated Infrastructure Initiative-Contract ENSAR No. 262010, P2IO (Physique des 2 Infinis et des Origines) laboratory of excellence, Bulgarian NSF Grant No. DID-02/16, the Australian Research Council Grant No. DP0773273, and the U.S. National Science Foundation, NSF Grant No. PHY-1404442.