mate-terminal-1.5.0: Take out libmate depend, see [1].

[1] http://wiki.mate-desktop.org/status:1.6
mate-1.5.0: remove libmatenotify

Mate now uses >=libnotify-0.7.0. A few packages have the changes in git but had no 1.5 release yet with it.

 * These packages depend on libmatenotify:
mate-base/mate-1.5.0 (>=x11-libs/libmatenotify-1.5.0)
mate-extra/caja-dropbox-0.7.1 (x11-libs/libmatenotify)
mate-extra/mate-power-manager-1.5.1 (>=x11-libs/libmatenotify-0.4.3)
mate-extra/mate-screensaver-1.5.1 (libnotify ? >=x11-libs/libmatenotify-1.2.0)
mate-extra/mate-sensors-applet-1.5.1 (libnotify ? x11-libs/libmatenotify)
net-wireless/mate-bluetooth-1.5.0 (>=x11-libs/libmatenotify-1.2.1)
mate-1.5.0: fix manifest