Further table cleanup.

We're back!

Primary focus of this patch was to finally add support for this season's Gallowdark missions.

New Features:
- Into the Dark mission packs, terrain, and objectives added.
- New table map conforming to KT Gallowdark dimensions.

Changes:
- Now defaults to new Gallowdark map.
- Changed how terrain bags are laid out; easier to see which bags are legacy content.
- Split KT model bags to fix issue where bags took too long to open for clients ( the models we borrowed are too powerful! ).
- Added misc terrain bags for creating custom terrain for first Critical Operations mission pack