use a minimal hashtable size for 1 file inside mpq

size of 4kb instead of 138kb for output file
Merge pull request #3 from HarpyWar/patch-1

use a minimal hashtable size for 1 file inside mpq
MPQSigner 1.0.1: Creates archives with minimal hashtable size
Merge pull request #1 from xboi209/master

merge from master