2016-07-12: prepare v0.9.1

prepare v0.9.1

diff --git a/NEWS b/NEWS
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,7 @@
 wisp ():
+- 
+
+wisp 0.9.1:
 - examples/d20world.w: implement basic plotting on a map.
 - more of the examples use the guile reader by default
 - examples/wisp.w: syntax for a with keyword
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], [0.9.0],
+AC_INIT([wisp], [0.9.1],
         [arne_bab@web.de])
 # Check for programs I need for my build
 AC_CANONICAL_TARGET