Add a "force move" function for soldiers

[krichter722]

Soldiers are attracted by attack targets quite intensively which is useful for unsupervised attacks, but prevents them from (efficient) retreat. Keeping the (sometimes) useful attraction and giving the possibility for retreat can be achieved with a force function for moving soldiers.

experienced with 0.3-alpha

[DerKrawallkeks]

I agree, but didn't I already open dich an issue¿ Not sure;) anyway, I agree and it's very annoying to play

[Karol-G]

Will this commit be merged into master someday or is it not working?