Ubuntu MATE 15.10 Final 发布

Ubuntu MATE 15.10 Final 发布，更新内容如下：

Fixed update-manager and do-release-upgrade to upgrade from Ubuntu MATE 15.04 to Ubuntu MATE 15.10.
Fixed the openSUSE panel layout, GNOME Main Menu no longer crashes.
Fixed ubi-timezone error in Ubiquity.
Fixed Caja undelete, which was causing Caja to crash or fail to undelete.
Updated MATE Tweak to 3.5.2a
- Remove all deprecated GTK properties.
- Make irrelevant UI elements insensitive rather than being hidden.
- Fix retaining the current theme settings when switching to Metacity.
- Fix Plank not being left running when saving a custom theme.
- Fix leaving multiple volume applets enabled when switching panel layouts.
- Fix CTRL+C not closing MATE Tweak.
Updated Ubuntu MATE Welcome to 1.0.3.5
- Removed Simple Screen Recorder, it is not compatible with Ubuntu MATE 15.10 or any 15.10 flavour.
- Remove Synapse, it has an intermitent issue resulting in segmentation fault on Ubuntu MATE 15.10.
Updated the boot screen artwork in the ISO image. Bigger, more consistent, and higher contrast for visually impaired users.
Updated Plank to 0.10.1.
Prepared Ubuntu MATE 15.10 for the Raspberry Pi 2.