Minor holy order fix

This is a vanilla issue.
Added Israelite cultural building
Added Nahuatl cultural building

Updated to PB building specs, just like the Israelite building
Vanilla Beta 2.1.5.3 Update

Not sure whether you'll want this change, but it's the only stuff that
doesn't require the new localisations.
Updated PB+SWMH culture buildings

They now have all the recent changes made to PB's cultural buildings,
including my Jewish and Nahuatl additions.
Updated Changelog
Merge pull request #162 from thefinestsieve/beta

Mostly building updates