drag & drop file upload
drag & drop file upload
add drag leave event
drag & drop images: inserted as base64 encode in WYSIWYG
Merge branch 'develop-ajaxupload' of https://github.com/daumcorp/DaumEditor into develop-ajaxupload

Conflicts:
	daumeditor/js/trex/canvas.js
	daumeditor/js/trex/event.js
	daumeditor/js/trex/modules/dropzone.js
	daumeditor/js/trex/panels/wysiwyg/eventbinder.js
FTDUEDTR-1447 drop zone - add test case, fix range, focus problem, add dropHtml
FTDUEDTR-1447 drag zone (test case config check)
Merge branch 'develop-ajaxupload' into RB-7.5

* develop-ajaxupload:
  FTDUEDTR-1447 drag zone (test case config check)
  FTDUEDTR-1447 drop zone - add test case, fix range, focus problem, add dropHtml
  add drag leave event drag & drop images: inserted as base64 encode in WYSIWYG
  drag & drop file upload