V2.4.0 - Dimension Doors & DartCraft!!!

This major update brings in two new mods, Dimension Doors, and the
previously removed DartCraft! Note that DartCraft has been heavily
nerfed since the last time it was used in this modpack.

Quests will eventually be designed for these mods on the server.

Other minor change(s):
- Optifine is once again set by default to be disabled