Bump version to 2.0.0 in configure.ac and wscript.

configure.ac

@@ -2,8 +2,8 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.59)
-AC_INIT(libmodbus, 1.9, stephane.raimbault@gmail.com)
-AM_INIT_AUTOMAKE(libmodbus, 1.9.0)
+AC_INIT(libmodbus, 2.0, stephane.raimbault@gmail.com)
+AM_INIT_AUTOMAKE(libmodbus, 2.0.0)
 AM_DISABLE_STATIC
 
 # Checks for programs.

wscript

@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # encoding: utf-8
 
-VERSION='1.9.0'
+VERSION='2.0.0'
 APPNAME='libmodbus'
 
 # these variables are mandatory ('/' are converted automatically)