NEWS: Update for version 10 development.

* NEWS.10.md: New file with headings from previous NEWS.X.md file.

* etc/module.mk (%canon_reldir%_EXTRA_DIST): Include NEWS.10.md in list.

etc/NEWS.10.md

@@ -0,0 +1,49 @@
+Summary of important user-visible changes for version 10 (yyyy-mm-dd):
+---------------------------------------------------------------------
+
+### General improvements
+
+### Graphical User Interface
+
+### Graphics backend
+
+### Matlab compatibility
+
+### Alphabetical list of new functions added in Octave 10
+
+### Deprecated functions, properties, and operators
+
+The following functions and properties have been deprecated in Octave 10
+and will be removed from Octave 12 (or whatever version is the second
+major release after 10):
+
+- Functions
+
+        Function               | Replacement
+        -----------------------|------------------
+
+The following features were deprecated in Octave 8 and have been removed
+from Octave 10.
+
+- Functions
+
+        Function               | Replacement
+        -----------------------|------------------
+        shift                  | circshift
+        sparse_auto_mutate     | none (see below)
+
+
+Summary of bugs fixed for version 10.1.0 (yyyy-mm-dd):
+----------------------------------------------------
+
+### Old release news
+
+- [Octave 9.x](etc/NEWS.9)
+- [Octave 8.x](etc/NEWS.8)
+- [Octave 7.x](etc/NEWS.7)
+- [Octave 6.x](etc/NEWS.6)
+- [Octave 5.x](etc/NEWS.5)
+- [Octave 4.x](etc/NEWS.4)
+- [Octave 3.x](etc/NEWS.3)
+- [Octave 2.x](etc/NEWS.2)
+- [Octave 1.x](etc/NEWS.1)

etc/module.mk

@@ -14,6 +14,7 @@
   %reldir%/NEWS.7.md \
   %reldir%/NEWS.8.md \
   %reldir%/NEWS.9.md \
+  %reldir%/NEWS.10.md \
   %reldir%/gdbinit
 
 %canon_reldir%_EXTRA_DIST += \