Prevent flickering crosshair cursor for line tool
it's OK (until major refactoring)
cleanup
updated changes.rst; jsDoc
Merge branch 'integration' of github.com:nens/lizard-client into dirk_improve_line_tool
update changes.rst
shift play-btn downwards
Merge pull request #243 from nens/improve_timeline_controls

[DONE] Improve timeline + controls
Merge conflict; jshint
Merge pull request #245 from nens/dirk_improve_line_tool

Dirk improve line tool
Merge conflict