UnitSync.cs (ZKL, maybe Autoregistrator): major optimization. 5min -> 10sec unitsync (for me)

It used to take 2 min to identify ModName from an archive (downloaded file) because it retrieve all archive data while it should've escaped a loop when a match was found.

To test, just download Example Mod from SVN ( https://code.google.com/p/zero-k/source/browse/trunk#trunk%2Fmods%2Fexamplemod ), open its ModInfo.lua, rename to 'Example Mod100' and ect, then copy paste to gamedata/Games folder (as sdz zip file), then go to: http://zero-k.info/ResourceDetail.aspx to confirm successful registration (also look at Lobby Diagnostic Log)