Merge branch 'Lacrymology/istanbul' into dev

* Lacrymology/istanbul:
  set coverage as the default test script for travis
  put back some of the playlists tests
  add coverage target
  separate mocha arguments
  add istanbul to requirements
add back mosto status test

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
logging

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
whitespace

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
return models tests

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
getWindow doesn't exist anymore

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
wip