Adds religious texts.

As discussed here: http://smf.cataclysmdda.com/index.php?topic=5295.0

Every effort has been made to avoid offense with the addition of these books. Their stats are identical, since these are more of verisimilitude items than anything. Since they have no 'chapters' you'll never tire of reading them like with other non-skill books.

Their spawn rates correlate (roughly; it's hard to have much granularity with such small numbers) with population percentages, but are all fairly low due to the fact that these are specific books. Whereas other non-skill books are nameless, generalized genres of books (If you have two ````war novel```` items, one might be *The Red Badge of Courage*, and the other might be *King Rat*) it's up to your imagination if they're different or identical, whereas if you were to have two copies of the *Bhagavad Gita*, you've definitely got two (more or less) identical copies of the same text.