2015-04-11: prepare 0.8.3

prepare 0.8.3

diff --git a/NEWS b/NEWS
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,7 @@
+wisp 0.8.3 (2015-04-10):
+- add partial source-properties support: show line numbers in backtraces.
+- d20world: start of experiement to plot the results.
+
 wisp 0.8.2 (2015-03-18):
 - resolve REPL delayed output bug.
 - forbid dot at the end of a line and as only symbol in a line to reserve them for future use.
diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 dnl run `autoreconf -i` to generate a configure script. 
 dnl Then run ./configure to generate a Makefile.
 dnl Finally run make to generate the project.
-AC_INIT([wisp], [0.8.2],
+AC_INIT([wisp], [0.8.3],
         [arne_bab@web.de])
 # Check for programs I need for my build
 AC_CANONICAL_TARGET