Add an autogen script on client and server side

Just have to run it and then make

autogen.sh

+#!/bin/sh
+
+# could be replaced with autoconf -v -f (verbose, force rebuild of ltmain, .in files, etc.)
+aclocal -I m4
+libtoolize --force
+autoheader
+autoconf -f
+automake -a
+./configure --prefix=/usr --with-debug

sflphone-gtk/autogen.sh

+#!/bin/sh
+
+# could be replaced with autoconf -v -f (verbose, force rebuild of ltmain, .in files, etc.)
+aclocal -I m4
+libtoolize --force
+autoheader
+autoconf -f
+automake -a
+./configure --prefix=/usr --with-debug

sflphone-gtk/configure.ac

@@ -15,7 +15,7 @@ AC_ARG_WITH(debug,
 		[with_debug=no]
 	)
 if test "x$with_debug" = "xfull" -o "x$with_debug" = "xyes"; then
-	CFLAGS="$CFLAGS -g -DDEBUG -Wall -Werror "
+	CFLAGS="$CFLAGS -g -DDEBUG -Wall"
 fi
 
 AC_PROG_CC