Add dynamical disk information

[vinc]

• Add SuperBlock struct
• Add LinkedBlock struct
• Add Drive struct
• Store total and allocated block count in super block
• Dynamically allocate the fs based on disk size or memory size
• Dynamically allocate the heap based on memory size
• Use the whole block for bitmap blocks
• Remove hardcoded bitmap and data area and size
• Add dynamical offset to superblock area

[vinc]

Next step: rewrite the BlockBitmap to use Block instead of LinkedBlock and make full use of the data buffer instead of skipping the first 4 bytes containing the next block address.