Make Computerplayer use ships to leave island

[codingberlin]

When a map is given where the start spots are located on small islands the computerplayer should build Ships to colonise the main island and build the economy there.

[codingberlin]

Possible implementation:

1. Check if there is another partition which is much bigger than the one of the computerplayer. If so, the first target of the computerplaner is to colonise it.
2. Build a basic sawmill and stone economy (not to few, because this would slow you down later, not too many, because the computerplayer needs space on the island)
3. Build: Ironsmith, Shipyard, Toolsmith, Harbour (and if possible coalmine, ironmine and fisher)
4. Build Ferry and occupy with pioneers the main partition
5. Ship some Troops to protect the pioneers
6. Build Cargo Ship and send Tools, Wood and Stone (maybe coal and iron as well)
7. Build the economy on the main partition
8. Move your tower to the main partition. To protect your main economy is more important than your island

[codingberlin]

@rpolzer I implemented the AI so far but I recently startet another 18-years project (twins) which takes all of my attention at the moment (currently we are working on the open issue "can turn around" :P)

So feel free -if you like to- to implement this feature of the AI. You could then see your ships in action.