Merge plugins - bethesdaFiles update

added Fallout3.esm, FalloutNV.esm, and Oblivion.esm.

could have added fallout DLCs to listing, but some of them might be
mergeable, so I'll leave their merging up to the user:

DeadMoney.esm
HonestHearts.esm
OldWorldBlues.esm
LonesomeRoad.esm
GunRunnersArsenal.esm
ClassicPack.esm
MercenaryPack.esm
TribalPack.esm
CaravanPack.esm