Updated package.json: Dependency "bloodline"
Moved lib/volume into directory

- Moved lib/volume.js -> lib/volume/index.js
- Moved lib/vbr.js -> lib/volume/boot-record.js
- Moved lib/fsinfo.js -> lib/volume/fsinfo.js
Added lib/alloc-table
Added lib/directory: DirTable & DirEntry structs
Added lib/lfn: LFN structure
Added lib/cluster: for alloc-table
Updated lib/fat32: updated/added structs
Updated lib/fat32: Added FAT32.format() stub
Added lib/file-system: fs api stub