Update dependencies to use new mt-downloader version

[leeroybrun]

We should update the dependency and check that the module is still working.

[philipgiuliani]

Would be awesome if you could do this!

[leeroybrun]

Yup! Unfortunately I'm quite busy these times because I'm currently finishing my Bachelor degree.

But will try to do this as soon as possible :-)

[philipgiuliani]

Have you looked at the fork of @zeltice ? It looks really good and he wrote his own version of the mt-downloader which seem to be much better for me!

https://github.com/zeltice/node-mt-files-downloader