Update README.

README

@@ -1,5 +1,7 @@
-This simple mod uses nodeboxes to supply a complete set of 3D flanged pipes, 
-along with "valve" and "pump" devices.
+This mod uses nodeboxes to supply a complete set of 3D pipes and tubes, 
+along devices that work with them.
+
+See "Overview.html" 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 
@@ -14,21 +16,9 @@ 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.
 
-There are no crafting recipes, yet, but you can use /giveme as usual, namely 
-"/giveme pipeworks:pipe 999" or so, and then place them as needed.  See 
-init.lua for more details.
-
-This mod is intended to be used as a basis or at least as sort of a model for 
-something else to build on (perhaps a nicer-looking oil mod?), and does not 
-provide any of the code necessary to cause anything to flow through them.  Like 
-the pipes, the valve and pump don't do anything useful yet, but you can punch 
-them to turn them "on" and "off".  Note that the valve and pump textures and 
-shapes are not yet complete (hence their boxy appearance).
-
 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.
 
-If you don't need the old node names from the previous version of this mod, 
-edit init.lua and comment-out the 'dofile' line at the top.
+All parts of this mod are licensed under the WTFPL.