Added new componentloader variable 'allowedAssetExtensionsByType' which breaks down the asset extensions by category

- Added swf files to allowed file types in wise_sample.properties
- Added a few additional audio and video allowed extension types
- Now using allowedAssetExtensionsByType to filter asset manager displays in authoring tool
Updated authoring components to use tinymce4

- Moved tinymce4 directory from 'vle/jquery/' to 'vle/js/' since we're not using the query version