Move instarepl widgets with other widgets in :widgets

* Moved widgets from ::widgets to :widgets in editor
* This fixes clearing instarepl widgets via command in LightTable/LightTable#1324
* This may also fix ::cleanup-on-destroy which was looking in :widgets
Merge branch 'fix-instarepl-widgets'
Rename cat to avoid conflict with new fn in 1.7, close #23
Fill out lein-light-nrepl project.clj
Remove unused test that doesn't compile
Remove unused cljs-result-format

Also appears in LT's eval.cljs
Release 0.0.14
Update changelog
Remove unused, auto-generated doc and test