UI fixes

fixed ai opponent selection, fixed info not clearing right away when
finish turn is clicked on map screen
UI and AI fixes

tweaked the ui for some corrections, such as it will now display which
nodes are capital cities, and tweaked the ai so it can no longer make
movements it shouldn't be able to make and made it slightly more
aggressive
Merge branch 'master' of https://github.com/Psiryu/4000War