Loot tweaks & transposer method fix.

* Remove harvestcraft food from chest loot. Probably wont do much for
* already-generated chests, but oh well
* /Remove/ End stone tranposer recipe, rather than adding it, doh.
Tweak natural absorption settings

* Remove base potency for absorption enchant.
* Make absorption enchant rarer
* Increase xp for potency book to 30
Move options.txt out to avoid inclusion in packs.

This overwrites client changes, so we dont realy need it past the first version