renamed instructor-index js to new_edit_modals.js
renamed index_videos to index_video_hover.js
created video_description_on_skin.js
created hide_on_ready.js, note_buttons.js, and fixed edit form duplication bug
created new_note.js, remove_md_preview.js, and refactoring video.js
removed make_markers.js, created new_note.js and update_note.js
created marker_functionality.js
cleaned up comments for .js files
cleaned up comments on css