if a undefined value is passed to remove, the whole FilesCollection will be removed because coffeescript to set a default value compare the argument passed to the function with '== null' to set the argument to {}
I think the solution is to delete the default value and let the check fail if the argument is not a string or a object

Test if the selector passed to remove() is a String or Object else return 0

Update server.coffee

Add missing var self = this; to interceptDownload

Remove unnecessary var self = this; declaration

Update google cloud integration example

Allow `headers` to be passed as an option to FilesCollection#load

 - No more CoffeeScript

 - Compatibility with `meteor@1.5.2.2`
 - NPM and Atmosphere dependencies update
 - No more coffee and CoffeeScript
 - __Deprecated__: globally available `Meteor.Files`
 - Implemented: `disableUpload` - Disable file upload, useful for
server only solutions, see updated [*Constructor*
docs](https://github.com/VeliovGroup/Meteor-Files/wiki/Constructor)
 - Implemented: `disableDownload` - Disable file download (serving),
useful for file management only solutions, see updated [*Constructor*
docs](https://github.com/VeliovGroup/Meteor-Files/wiki/Constructor)
 - Minor fix in [Google Cloud Storage
Integration](https://github.com/VeliovGroup/Meteor-Files/wiki/Google-Clo
ud-Storage-Integration), big thanks to @amos-whitewolf , see #498
 - Implemented: Custom headers in [`.load()` method
(*updated*)](https://github.com/VeliovGroup/Meteor-Files/wiki/Load),
thanks to @zwjcarter , see #501
 - Move events interface to [`eventemitter3`
package](https://github.com/primus/eventemitter3)
 - Solve #500 removing 25ms delay before setting `auth-token-cookie`
for `protected` downloads, thanks to @vbelolapotkov for pointing this
out. Not sure if this will help for initial issue which stated `First
download attempt`, as Meteor's login is async and happens only after
DDP connection is established.
 - Fix `this.user` in `onBeforeRemove` hook
 - Deprecate (*temporarily*) `throttle` option, not sure if it was
working from the beginning