basic support for uuid#1

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y0g1 wants to merge 4 commits intoox-it:masterfrom

Commits on Jan 26, 2013

Adding get_uuid method for reading UUID of drive
y0g1
committed
Update README.rst
Michał Bielecki
committed
Switching from blkid command, to libblkid through ctypes for UUID detection
y0g1
committed
Returning empty string for empty device name
Michal Bielecki
committed