cities location fixed
Add save/load empire state in oc3save file.
Finance adviser improved.
YesNo dialog box add. Request before route create add on empire map window.
Update trade adviser
Improved trade adviser window drawing. add CityTrading class. Rename oc3_market->oc3_building_market. Refactoring form/button background fill alg.
Rename oc3_nfile->oc3_filesystem_file. PictureBank removed duplicate code.
Refactoring picture decorator class.
Refactoring picture decorator.
Water overlay - almost working.
Fixed offset for wateroverlay pictures
Trade adviser window improved
Merge branch 'master' of https://github.com/nickers/opencaesar3
Removed offsets water overlay tile pictures.
Merge pull request #180 from dalerank/master

WaterOverlay improved. TradeAdviser improved.