Update M15 Oracle changes, plus some cost & type fixes to M15 cards.

git-svn-id: http://svn.slightlymagic.net/forge/trunk@26662 269b9781-a132-4a9b-9d4e-f004f1b56b58
Update M15 Oracle changes, plus some P/T & type fixes to M15 cards ('n'-'z').

git-svn-id: http://svn.slightlymagic.net/forge/trunk@26663 269b9781-a132-4a9b-9d4e-f004f1b56b58
Update oracle text of Sensation Gorger and fix Vhati-il-Dal.

git-svn-id: http://svn.slightlymagic.net/forge/trunk@26664 269b9781-a132-4a9b-9d4e-f004f1b56b58
Fix ability descriptions of Vhati il-Dal.

git-svn-id: http://svn.slightlymagic.net/forge/trunk@26665 269b9781-a132-4a9b-9d4e-f004f1b56b58
Fix P/T determination when only base power or base toughness is set for a creature.

git-svn-id: http://svn.slightlymagic.net/forge/trunk@26666 269b9781-a132-4a9b-9d4e-f004f1b56b58