Update GNOME to 3.14.2.

This update was brought to you in collaboration with Gustua Perez

Make sure gtk30 pulls it the default theme (adwaita-icon-theme).
Update the extra gnome-shell-extensions so they work with gnome-shell 3.14.
Drop metacity from gnome3 meta-port.
Remove the gtile gnome-shell extension since it proven to be buggy.

Exp-run done by antoine@ for gdk-pixbuf2 deprecated API.

PR:		195414
Obtained from:	gnome dev repo


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@373802 35697150-7ecd-e111-bb59-0022644237b5
Fix categories _again_, I don't know how the fix got revered.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@373803 35697150-7ecd-e111-bb59-0022644237b5
Update to 5.5.41 release.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@373804 35697150-7ecd-e111-bb59-0022644237b5
Update to 5.6.22 release.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@373805 35697150-7ecd-e111-bb59-0022644237b5
Add new keyword for to run glib-compile-schemas.

It be used by the GLIB_SCHEMAS macro in the next gnome update, for ports
using GLIB_SCHEMAS nothing will change.

Approved by:	portmgr (bapt)


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@373806 35697150-7ecd-e111-bb59-0022644237b5