Gather all information from IMG directly

[gorgobacka]

It would be better to get all information from the IMG file directly without using imagemounter or filemagic.

Improvements:

• no sudo required
• platform independent

Source for information:

• http://www.codeguru.com/cpp/cpp/cpp_mfc/files/article.php/c13809/Extract-Floppy-Disk-Geometry-from-the-Boot-Sector.htm
• https://github.com/hamptus/pyMBR/blob/master/mbr.py