Updating to MATE 1.14

[lah7]

To avoid the same question being asked in numerous threads, let's keep track in the Developments Discussion:

Ubuntu 16.04 with MATE 1.14?

Wow first of all great job @Wimpy and team for the new release of MATE 1.14 Changelog My question is if we will have by default 1.14 or we need to upgade the interface via a ppa? If we will upgrade via a ppa when we will have that ppa available in 16.04?