Add mods: technic, moreores, paintings, Nyancat (Pbj_pup). Small fix: sandwiches

mods/pipeworks/README

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+This mod uses nodeboxes to supply a complete set of 3D pipes and tubes, 
+along devices that work with them.
+
+See https://github.com/mt-mods/pipeworks/wiki/ for detailed information about usage of this mod.
+
+Unlike the previous version of this mod, these pipes are rounded, and when 
+placed, they'll automatically join together as needed.  Pipes can go vertically 
+or horizontally, and there are enough nodes defined to allow for all possible 
+connections.  Valves and pumps can only be placed horizontally, and will 
+automatically rotate and join with neighboring pipes as objects are added, as 
+well as joining with each other under certain circumstances.
+
+Pipes come in two variants: one type bears one or more dark windows on each 
+pipe, suggesting they're empty, while the other type bears green-tinted 
+windows, as if full (the two colors should also be easy to select if you want 
+to change them in a paint program).  These windows only appear on straight 
+lengths and on certain junctions.
+
+This mod is a work in progress.
+
+Please note that owing to the nature of this mod, I have opted to use 64px 
+textures.  Anything less just looks terrible.
+
+The teleport tube database used to be kept in a file named 'teleport_tubes'.
+The database is now kept in mod storage. The migration from 'teleport_tubes' is
+automatic. The old file is then kept around but is not used at all.