Implement ZLIB compressed system file reader and writer.

[pspp] / NEWS

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+++ b/NEWS
@@ -3,8 +3,29 @@ Copyright (C) 1996-2000, 2008-2013 Free Software Foundation, Inc.
 See the end for copying conditions.
 
 Please send PSPP bug reports to bug-gnu-pspp@gnu.org.
+ 
+Changes since 0.8.1:
 
-Changes after 0.8.0:
+ * Charts are now rendered with colours from the Tango palette instead
+   of fully saturated primaries.
+
+ * PSPP can now read and write ZCOMPRESSED system files, a new format
+   variant that compresses data much more effectively than the
+   previous form of compression (which is still supported).
+
+ * Missing values for long string variables are now read from and
+   written to system files in an SPSS-compatible fashion.
+
+   (Earlier versions of PSPP that supported missing values for long
+   string variables wrote them to system files in an SPSS-incompatible
+   way.  To fix the problem, read the system file with this version of
+   PSPP and then save a new copy of it.)
+
+ * Build changes:
+
+   - zlib is now a required dependency.  (Previously it was optional.)
+
+Changes from 0.8.0 to 0.8.1:
 
  * New commands: