Remove GStreamer parts and use libmatemixer
Clean things up a bit, update copyright, remove unused code, fix NEWS and compiler warnings
Update to libmatemixer changes
Remove debugging message
Unmute when lowering volume and the target volume is higher than minimal
Merge branch 'libmatemixer'
Bump version to 1.9.3
Update PORFILES.in
Revert "Update PORFILES.in"

This reverts commit 8220f432b99145a4ec9089807537ed351c041110.
media-keys: Remove old cut-n-paste code
configure gtk settings gtk-dialogs-use-header and gtk-enable-animations
Require mate-desktop 1.9.3

We depend on new keys in commit 96de90af074a934129225ebf0e51764affef53ef
a11y-keybindings: Move to media-keys plugin
Add a11y-settings plugin
a11y: Use gnome a11y schema to enable applications

For example when we toggle screen-reader-enable in the gnome schema
orca will turn on and off even under MATE.
a11y-settings: Monitor gnome schema keys instead of MATE's
Merge remote-tracking branch 'upstream/master'

Conflicts:
	plugins/media-keys/Makefile.am
	plugins/media-keys/acme.h
	plugins/media-keys/cut-n-paste/gvc-gstreamer-acme-vol.c
	plugins/media-keys/msd-media-keys-manager.c
	plugins/media-keys/test-media-keys.c