Importing UploadIcon.svg as Component

[joshuaai]

This keeps the original SVG file rather than inlining it as in #22.
The image is passed instead as a the src property to the <img /> tag.
This fixes #21.

[ivnnv]

I forgot to comment on this, but this doesnt not solve the issue of having to configure webpack to handle svg tags even when "importing" as a component (which is actually just a link to the file, not a proper comonent).
I was testing this in different environments and as the svg-loader is still needed... i personally wont merge this PR.
PS: More info on svg and why create-react-app is able to handle it (but webpack without loader can NOT)
facebook/create-react-app#1388
jhamlet/svg-react-loader#86 (comment)

[JakeHartnell]

I think we need to update some of the tooling on this repo. It would be nice if the npm package distributed a build common js module, I think that would make it much nicer to work with as a dependency in other projects.