This demo will use the components from
https://github.com/tomitrescak/meteor-uploads
the packages you need are:
https://atmospherejs.com/tomi/upload-server
https://atmospherejs.com/tomi/upload-jquery
$ meteor add tomi:upload-server
$ meteor add tomi:upload-jquery
For another way to do this, see my other demo https://github.com/wesyah234/fileUploadDemo which uses https://github.com/CollectionFS/Meteor-CollectionFS