**Acknowledgements**

This work was supported by grants from National Science Center Poland: 7690/B/ P01/2011/40,DEC-2011/01/D/NZ9/03631, DEC-2011/01/N/NZ9/02900, DEC-2012/06/A/ NZ9/00125 and 2014/13/D/NZ1/00061. This publication was also supported by the Polish Ministry of Science and Higher Education, under the KNOW program.
