Map Generation Improvements:
* More variety to Continents and Pangea map
* Improved city placement

Several Bugfixes:
* End Turn now properly turns blue when all units are out of actions
* Removed option to break ice on a frozen unit
* Market sprites now properly updates when building or destroying ports
* Invisible units are now revealed when breaking ice or harvesting starfish
* Removed confirmation popup when harvesting starfish
* ...and more