Merge branch 'lucas_dropbox' into 'master'

added blob datatype in dropboxstorage getAttachment's ajax request,

to not receive corrupted files

See merge request !1

src/jio.storage/dropboxstorage.js

@@ -213,6 +213,7 @@
       .push(function () {
         return jIO.util.ajax({
           type: "GET",
+          dataType: "blob",
           url: get_template.expand({
             root: that._root,
             id: id,