Bump version to 3.5.2

To go along GNOME Shell 3.5.2

NEWS

@@ -1,3 +1,16 @@
+3.5.2
+=====
+* removable-drive-menu is now a11y friendly
+* the dock can now be placed on any monitor, not just the primary
+* dock is now clipped to its monitor
+* alternative-status-menu now exposes GSettings for Suspend
+  and Hibernate visibility - no UI yet
+* more gnome-shell API changes (places-menu, removable-drive-menu,
+  alternative-status-menu)
+* miscellaneous bug fixes (native-window-placement, gajim,
+  auto-move-windows)
+* updated translations
+
 3.4.0
 =====
 * build system improvements

configure.ac

@@ -1,5 +1,5 @@
 AC_PREREQ(2.63)
-AC_INIT([gnome-shell-extensions],[3.4.0],[https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-shell&component=extensions])
+AC_INIT([gnome-shell-extensions],[3.5.2],[https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-shell&component=extensions])
 
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_AUX_DIR([config])