Fixed buldings collision

Added:
Building 9a
Building 9b
Building 9c
88th Flag Phase 1
88th Flag Phase 2

Added:
Building 7a/7b/7c/7d
Building 8a/8b/8c/8d
Building 1d/2d/3d/4d/5d/6d
Wall 1 (1a)
Wall 1 (1b)
Wall 1 Corner (1a)

Added:
Building 5a/5b/5c
Building 6a/6b/6c

Updated:
Building 4 textures
Building 4 pivot point

Added:
Building 4a/4b/4c

Updated:
Building 1a/1b/1c textures
Building 2a/2b/2c textures

Fixed:
Building 3a/3b/3c missing preview pictures

Initial release