Fixes for CKEDITOR in Composer and Editor

FE:
- Restored the SoundCloud Starlight player embed tool for editors
- Removed "weird editor logic" left behind from initial integration
tests that I missed

* Still have more cleanup to do in the actual CKEDITOR plugin for the
player. It needs to render its inplace editor constructs. I need to,
however, refactor the plugin code out of the bower_components directory
where it does NOT belong up to the Pulsar FE project's scripts directory
in a sane location.