Update a050 is live!

Bigger colonies will come soon along with a better method of using them. For now though, it is a small step toward a functioning release.

additions

- flags now are colonies with a radius. Only islands within the radius produce resources!
- tooltips for resources which show income/cost (temporarily disabled)
- new spread function for islands should be less laggy and more effective
- new manpower / militia resource required to build airships (comes from houses)
- use "A" with airships selected to use "surround" mode where they will form an arc around a point
- waves in survival and conquest should not spawn in groups larger than 10 (but multiple groups may spawn)
- new cursor shows the resources needed for an airship

fixes

- lots of stuff I can't remember