WebSubmit: new javascript based photo uploader

* Replaces the uploadify plugin with the plupload plugin
  (drag-and-drop)

* Adds the possibility of replacing photos

Signed-off-by: Charalampos Tzovanakis <charalampos.tzovanakis@cern.ch>
Reviewed-by: Ludmila Marian <ludmila.marian@gmail.com>

Conflicts:
	modules/websubmit/lib/websubmit_webinterface.py
WebSubmit: crop on photo submission

* Crop images on photo submit

* Adds to web icon new `crop` format

* HTTP API to crop images on the fly and serve them

Signed-off-by: Charalampos Tzovanakis <charalampos.tzovanakis@cern.ch>
WebSubmit: photo submission: French caption

* Adds tabs on uploaded image captions with English and French languages