js: Migrate Grunt from 0.3 to 0.4
js: Upgrade when.js from 1.6.1 to 1.8.1
Revert "Merge pull request #231 from adamcik/feature/end-of-track"

This reverts commit 1cf9826f8742f798fa78c45f123fce05f42bd6cc, reversing
changes made to 711dbe87384c7e7d025d541ae5f08cacb1733045.
Revert "docs: Add changelog entry for EOT/EOS fixing."

This reverts commit 42e84c8e2ea62ced1fe8c226df9d3fe158ff69e1.

Conflicts:
	docs/changes.rst
tests: Use audio instancee, not module
Merge branch 'develop' of git://github.com/mopidy/mopidy.git into develop