Fixed an issue with being able to dev when not having enough development points, resulting in negative dev points

Changed the capital area bonus from +50% bonus dev points to +0.06 base dev points. This should be stronger at the beginning and then become weaker later into the game hopefully slowing down those free cities.

Fixed hostile move speed modifier in ramparts slow enemies rather than speed them up

Fixed a bug with envoy buttons in court window, where you couldn't remove them for a month.

Added the ability for the AI to Expand Infrastructure

First release version

Initial version