[BtS] Extended Y Grid Tech Screen 2016-10-05

I altered the tech screen to increase the grid form 14 Y spaces to 19 without having a vertical scrollbar, and made some tech xml changes as well to work with it.

Here is thread for discussion.

http://forums.civfanatics.com/showthread.php?t=265015

I just reuploaded this on 03/08/2008.