[clutter] (19 commits) ...Merge branch 'wip/meson' into 'master'

[Emmanuele Bassi <ebassi src gnome org>]

Summary of changes:

  d890696... Initial port to Meson (*)
  aee9618... Clean up the generated enumeration type template (*)
  979e4b9... Update the clutter-config header template (*)
  4c06e44... Drop duplicate const specifier (*)
  278513d... Ignore deprecation warning for g_object_newv() (*)
  5b1d5d8... gdk: Handle all GDK device types (*)
  e900eb1... gdk: Remove unused variable (*)
  e58d52c... Rename build directory to build-aux (*)
  5c27fc3... Move all cookbook files under the same directory (*)
  c9c7397... meson: Add rules for generating the documentation (*)
  1f9ab17... Cast the g_object_ref() return value (*)
  369de5f... meson: Add conformance test suite (*)
  bb4444c... docs: Update the links for Clutter resources (*)
  9d616b6... docs: Move to Markdown (*)
  e0fe839... build: Add the Meson files to the Autotools dist (*)
  8857547... build: Generate all pkgconfig files (*)
  d65cdd4... Add CI infrastructure for Clutter (*)
  7943a09... tests: Disable actor-shader-effect (*)
  ad0bc0b... Merge branch 'wip/meson' into 'master'

(*) This commit already existed in another branch; no separate mail sent