HTML editor : needed functionality

For LimeSUrvey 2.06 (or up), it seems we need to update the HTML editor. We can try to update ckeditor, but we need to rework some part. Then alternative solution are welcome. To add a solution add a page to http://manual.limesurvey.org/Category:Development_HTML_editor

GPL 2 compliant


 * Managable placeholder list ( {QSID} {answerSGQA} ....)
 * Upload/link to file (external : easy integration)
 * Image upload (external : easy integration)
 * i18n