Full bump of library version.

configure.ac.in

@@ -8,7 +8,7 @@ dnl
 dnl ***************************
 dnl *** Version information ***
 dnl ***************************
-m4_define([libxfce4panel_verinfo], [2:2:1])
+m4_define([libxfce4panel_verinfo], [3:0:0]) dnl current:revision:age
 m4_define([libxfce4panel_version_api], [1.0])
 m4_define([xfce4_panel_version_major], [4])
 m4_define([xfce4_panel_version_minor], [7])