Update Notes For 16 Jan

- fixes and improvements to the UI system
- bugfix related to the duplication of troops
- changes to gold and peasant management, each troop can carry gold now
- possibility to immediately recruit Militia in exchange for a certain amount of city population
- changes to the system of surrounding units, only small units can be surrounded. A unit becomes surrounded when there are enemies on two opposite, adjacent fields. A larger number of enemies does not increase the effect.
- change in the way experience is distributed after winning a battle - all units receive the same amount of experience points, depending on the strength of the defeated army