kzip: Use binary search to speed up reads and scans. (#105)
kzip: Use binary search to speed up reads and scans. (#105)

When opening a reader, pre-sort the file entries by name, allowing the Lookup,
Scan, and Open methods to work more quickly.

kythe/kythe,kythe/kythe,kythe/kythe,bzz/kythe,kythe/kythe,bzz/kythe,kythe/kythe,bzz/kythe,kythe/kythe,kythe/kythe,bzz/kythe,bzz/kythe,bzz/kythe,bzz/kythe,bzz/kythe,bzz/kythe,bzz/kythe,kythe/kythe,kythe/kythe,bzz/kythe,kythe/kythe,kythe/kythe,bzz/kythe