Add support for BinaryFileResponse

[Deltachaos]

This is derived from #30

At the first stage add support for BinaryFileResponse using non blocking React filesystem

[mmoreram]

Same here.

This feature is really amazing.
Could you please rebase from master and send the PR again with some test cases?
I can do it for you if you want.

Thanks.

[Deltachaos]

@mmoreram if you could rebase and add some tests this would be amazing :)

[mmoreram]

@Deltachaos Still interested in this.

Do you want to refactor this?
Do you want me to refactor this, take your code and open a PR?

Thanks!

[Deltachaos]

@mmoreram i have currently no time to make the changes. So feel free to continue on my work. I would be happy if this feature makes it way to get merged as well.