Merge pull request #133 from zijistark/alpha

Stuff for this hotfix coming any day now...
Override conversion_decisions.txt
Conversion decisions
Disabled vanilla RoI "convert to province culture" decision for AI

There are already events which do this, and they're smarter about it.
This was the cause of the many complaints about kings and such randomly
changing to obscure cultures due to 1 stray province.  However, note
that the RoI AI decisions to convert to hinduism, buddhism, and jainism
all remain unfettered.
New Crusader States should now clear all holding modifiers; obscure
Merge pull request #134 from zijistark/alpha

You know, stuff.
Conversion decisions bug fix

It's actually a vanilla error which still hasn't been fixed; as long as
we're distributing the file we might as well get it right
Merge pull request #135 from thefinestsieve/beta

Conversion decisions bug fix
Imperial Reconquest fix for when Byz is liege to the Catholic Pope
Merge branch 'alpha' into af2
Initial commit of [skeleton] experimental CB and minimal support code