-fixed collision for openwindow_2
-fixed texture mapping for openwindow, openwindow_2
-added enclosed version openwindow, openwindow_2
-fixed wall_window wrong constructions
-fixed mapping for wall_window
-added wall_window_2 and enclosed version window and window_2

-corner_doorwayL/R: no longer airtight thru doorway, fixed backwards icons.
-fixed "Air Vent with wall" one of the walls missing collision.
-Added ceiling blocks. It is light grey with rounded corners for the ceiling, colorable on the floor side. They don't have contruction stages yet, if you get purple square from placing in survival just weld it up it's fine. (on that note I still need constructions for air vents too). Was having too much fun playing with these, decided you guys can wait on constructions.

-Added Oxygen Vent, 4 variants.
-Removed floating holo terminal from door frames.
-Changed corner R/L doorways to LCD type.
-Added menu grouping.
-Doors should be airtight when closed.
-Started remapping textures so that the DLC skins look better. Maybe 70% done.
-Fixed mountpoints / airtightness holes, hitting these as I go along with texture remapping.
-Fixed LOD issue with one of the walls where the emissive stripe was missing.