Add license and version comment to all scripts

addon/comment/comment.js

addon/comment/continuecomment.js

addon/dialog/dialog.js

addon/display/fullscreen.js

addon/display/placeholder.js

addon/display/rulers.js

addon/edit/closebrackets.js

addon/edit/closetag.js

addon/edit/continuelist.js

addon/edit/matchbrackets.js

addon/edit/matchtags.js

addon/edit/trailingspace.js

addon/fold/brace-fold.js

addon/fold/comment-fold.js

addon/fold/foldcode.js

addon/fold/foldgutter.js

addon/fold/indent-fold.js

addon/fold/markdown-fold.js

addon/fold/xml-fold.js

addon/hint/anyword-hint.js