csum: add file number progress

Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
Merge pull request #20 from Nefelim4ag/csum-progress

csum: add file number progress

Signed-off-by: Timofey Titovets nefelim4ag@gmail.com
Merge pull request #18 from Nefelim4ag/master

fix: compile with optimizations