Upgrade version to 0.9.1 in configure too

Author: vadz

configure.ac

@@ -34,7 +34,7 @@ dnl SUCH DAMAGE.
 dnl === Prologue ===
 
 AC_PREREQ(2.61)
-AC_INIT(xmlwrapp, 0.9.0, [[email protected]])
+AC_INIT(xmlwrapp, 0.9.1, [[email protected]])
 
 AC_CONFIG_SRCDIR([xmlwrapp.pc.in])
 AC_CONFIG_AUX_DIR([admin])