Enhanced EDT for Hammer

EEDT is a pseudo plugin for Hammer that will significantly decrease EDT creation time. See MapEdit documentation for details.

• Basic functionality
• Feature: Custom KeyValues style format for easier readability
• Feature: Comments
• Feature: ChangeGroups
• Feature: Import existing EDTs to resolve updated maps
• Feature: Merging global EDTs
• Look into updating MapEdit to support modifying outputs. So we don't have to delete then recreate an entity with the changed outputs. (Prob best to reference the entire output data for an exact match, fire warning if no output was found incase the entity changed)
• Use EEDT to generate EDTs for a new game/mod or redo existing EDTs to test EEDT