[clutter] Release Clutter 1.21.6

[Emmanuele Bassi <ebassi src gnome org>]

commit 9b4a7a9964796150240f8b19fe4f47a769b94b83
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Mar 3 16:16:39 2015 +0000

    Release Clutter 1.21.6

 NEWS         |   49 +++++++++++++++++++++++++++++++++++++++++++++++++
 configure.ac |    2 +-
 2 files changed, 50 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 2d94ceb..478b7d6 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,52 @@
+Clutter 1.21.6                                                       2015-03-03
+===============================================================================
+
+  • List of changes since Clutter 1.21.4
+
+    - Support quad-buffer stereo displays on X11/GLX
+    This allows using Clutter to draw on GLX framebuffers with the stereo
+    bit set.
+
+    - Add a Mir windowing system backend
+    This allows using Clutter applications natively on systems using the
+    Mir display server.
+
+    - Depend on Cogl ≥ 1.19 and Cairo ≥ 1.12
+    Cogl 1.19 is needed for the newly added Mir windowing system backend,
+    as well as the quad-buffer stereo display on X11. Cairo 1.12 is needed
+    for dropping the ad hoc check for the device scale parameter used with
+    ClutterStage implementations as well as the ClutterCanvas content.
+
+    - Improvements in the evdev input backend
+
+    - Use the GdkFrameClock to drive the ClutterMasterClock
+    When using the GDK backend, we want the ClutterMasterClock to be driven
+    by the GdkFrameClock, as the latter is automatically frame limited by
+    the compositor, which gives better results for client applications.
+
+    - Updated translations
+    Spanish, Hebrew, Hungarian, Czech, Basque, Russian, Slovenian, Galician,
+    Chinese (Taiwan), French, Brazilian Portuguese, Lithuanian, Serbian.
+
+  • List of bugs fixed since Clutter 1.21.4
+
+    #743355 - gdk: report an error when initialization fails
+    #743615 - evdev: Ignore non seat wide button or key events
+    #744058 - gdk: Disable cogl wayland event dispatching if requested
+    #743865 - MetaSurfaceActorWayland: unset the surface when it goes away
+    #744604 - stage: Process state update event immediately
+    #744668 - GDK: integrate the MasterClock mechanism with GdkFrameClock
+    #732706 - Allow setting up quad-buffer stereo output
+
+Many thanks to:
+
+  Lionel Landwerlin, Jonas Ådahl, Alexandre Franke, Aurimas Černius,
+  Balázs Úr, Chao-Hsiung Liao, Daniel Mustieles, Fran Dieguez,
+  Giovanni Campagna, Inaki Larranaga Murgoitio, Jasper St. Pierre,
+  Marco Trevisan (Treviño), Marek Černocký, Matej Urbančič, Owen W. Taylor,
+  Rafael Ferreira, Rui Matos, Yosef Or Boczko, Yuri Myasoedov,
+  Мирослав Николић
+
 Clutter 1.21.4                                                       2015-01-22
 ===============================================================================
 
diff --git a/configure.ac b/configure.ac
index fca752b..9127a5a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -10,7 +10,7 @@
 # - increase clutter_interface_version to the next odd number
 m4_define([clutter_major_version], [1])
 m4_define([clutter_minor_version], [21])
-m4_define([clutter_micro_version], [5])
+m4_define([clutter_micro_version], [6])
 
 # • for stable releases: increase the interface age by 1 for each release;
 #   if the API changes, set to 0. interface_age and binary_age are used to