add savestock and loadstock to NEWS and Readme.rst

NEWS

@@ -2,6 +2,9 @@ DFHack Future
     Internals:
     Fixes:
     New plugins:
+        - savestock and loadstock: two commands for saving and loading
+          stockpile settings to a file. They can be used to migrate stockpile
+          settings between worlds and saves.
     New scripts:
     Misc improvements:
 

Readme.rst

@@ -308,12 +308,54 @@ twaterlvl
 ---------
 Toggle between displaying/not displaying liquid depth as numbers.
 
+stockpile settings management
+-----------------------------
+
 copystock
-----------
+~~~~~~~~~
+
 Copies the parameters of the currently highlighted stockpile to the custom
 stockpile settings and switches to custom stockpile placement mode, effectively
 allowing you to copy/paste stockpiles easily.
 
+savestock
+~~~~~~~~~
+
+Saves the currently highlighted stockpile's settings to a file in your Dwarf
+Fortress folder. This file can be used to copy settings between game saves or
+players.
+
+example:
+
+```
+savestock food_settings.dfstock
+```
+
+loadstock
+~~~~~~~~~
+
+Loads a saved stockpile settings file and applies it to the currently selected
+stockpile.
+
+example:
+
+```
+loadstock food_settings.dfstock
+```
+
+To use savestock and loadstock, use the 'q' command to highlight a stockpile.
+Then run savestock giving it a descriptive filename. Then, in a different (or
+same!) gameworld, you can highlight any stockpile with 'q' then execute the
+'loadstock' command passing it the name of that file. The settings will be
+applied to that stockpile.
+
+**Notes:** It saves and loads files relative to the DF folder, so put your files
+there or in a subfolder for easy access. Filenames should not have spaces.
+
+**Limitations:** Generated materials, divine metals, etc are not saved as they
+are different in every world.
+
+
 rename
 ------
 Allows renaming various things.