change the way factories are chosen

[pandaro]

this is an attempt to get a better system to choice a factory, a bit more complex and at the same time, more simple: 1 first add a list of unit that a factory can build in unittable 2 create a functiona called one time to get a rating of the factories in this map(use spotmapmobrank and other things 3 annotating the state of the inbuild factories and in what mobarea(this can make duplicate filter for factory totally useless) 4 rewrite bestfactory, splitting for more readability 5 add a pre economic filter in tasks, so this function is not called every time many other things can be done, but, for the first attempt, i'm very satisfied ( maps like sailaway are not bad managed) work is progress

[eronoobos]

it works well! i'll just update the BA unit table, too