Additional properties for Bpb
Implemented $VOLUME_NAME attar class
Added ability to lookup mft attribute by type_id
Moved file size string formatter to separate mod

Might not use hurry.filesize module eventually, implement formatting
without the mod
Added abstract dump_volume method for parent

Every volume class w have to implement it (to print volume information)
Added file size string formatter implementation

Took from: http://code.activestate.com/recipes/\
578323-human-readable-filememory-sizes-v2/
Updated usage doc

Included printing volume information
Added dump_volume implementation for ntfs