Added Natural Gift values for Kee/Maranga Berries

As per
http://www.smogon.com/forums/threads/battle-mechanics-research.3489239/page-50#post-5105979
Revert "Added Natural Gift values for Kee/Maranga Berries"

This reverts commit 95dd5f003351fc0a70a07e7b372e69ed744e19fb.