tox: Fix Tornado version mismatch in env name and deps

(cherry picked from commit acef38a6c75bb46324d4a49b57552f2320f02694)
travis: Update tox env names

(cherry picked from commit e950cf5501bf82787e202024774a4e5f6f85ed27)
Merge pull request #801 from arjunrn/develop
audio: Link to context of why we demote jack sinks
(cherry picked from commit 29019d94af42e81b478dd283a70c809f78e5f650)
doc: Add changelog entry for jack sink fix
(cherry picked from commit 0440703abbe8a96eb45a1795fdca2482f7998b9d)

Conflicts:
	docs/changelog.rst
docs: Update authors

(cherry picked from commit 614dc93ad85e58be563f3cb7cfb4ffa3c951b202)
docs: Add Mopidy-Banshee

(cherry picked from commit a470e0c9147d528fa09a1fedccfe0f9f507bc433)
docs: Add Mopidy-Bassdrive

(cherry picked from commit c51988546da16fdb1017c7411fd26b70f783e4d4)
docs: Add Mopidy-LeftAsRain

(cherry picked from commit 2a28128c37732f07e6ddaa1cd712949cbad49245)
docs: Add Mopidy-Touchscreen

(cherry picked from commit 27d4c89ae98c8cf64fc3da355050c180d35ac232)
Merge branch 'release/v0.19.x' into develop