Issue #1473066 by JohnAlbin, echoz: Move third-party assets out of core/misc folder.

.jshintignore

core/assets/vendor/.gitignore

core/assets/vendor/backbone/backbone.js

core/assets/vendor/ckeditor/CHANGES.md

core/assets/vendor/ckeditor/LICENSE.md

core/assets/vendor/ckeditor/build-config.js

core/assets/vendor/ckeditor/ckeditor.js

core/assets/vendor/ckeditor/lang/_translationstatus.txt

core/assets/vendor/ckeditor/lang/af.js

core/assets/vendor/ckeditor/lang/ar.js

core/assets/vendor/ckeditor/lang/bg.js

core/assets/vendor/ckeditor/lang/bn.js

core/assets/vendor/ckeditor/lang/bs.js

core/assets/vendor/ckeditor/lang/ca.js

core/assets/vendor/ckeditor/lang/cs.js

core/assets/vendor/ckeditor/lang/cy.js

core/assets/vendor/ckeditor/lang/da.js

core/assets/vendor/ckeditor/lang/de.js

core/assets/vendor/ckeditor/lang/el.js

core/assets/vendor/ckeditor/lang/en-au.js