setup carver and symbol name hash limits to be working on both hosts 32-bit and 64-bit
correct carver index prototype to be 32-bit wide, all functionality rely on this fact
offset is now 17-bit wide on 64-bit host and 16-bit wide on 32-bit host
it lower number of blocks from 2^16 to 2^15, but it is sufficient now
in the future carver index should be extended to 64-bit on 64-bit host