Combine buildings from different mods into logical building groups and categories, so build menu much easier to navigate and use.

Rules for grouping:
1. Add Building Group to buildings by building purpose. Use arrows to cycle between buildings
2. Buildings in CAMPING, GATHERING, SCRAPWORKING and CAMP *SOMETHING* tab don't create outpost. All other tabs - do

Should be compatible with all mods, because it doesn't add or remove something.
Feel free to request mod integration in comments.