Merge branch 'master' of https://github.com/openstf/stf into s3insteadoftmp

lib/units/storage/temp.js

@@ -138,6 +138,10 @@ module.exports = function(options) {
   app.get('/s/blob/:id/:name', function(req, res) {
     var file = storage.retrieve(req.params.id)
     if (file) {
+      if (typeof req.query.download !== 'undefined') {
+        res.set('Content-Disposition',
+          'attachment; filename="' + path.basename(file.name) + '"')
+      }
       res.set('Content-Type', file.type)
       res.sendFile(file.path)
     }