Inline SVGs in a platform independent way

[tanx]

I've looked into how we can leverage the svgr compiler in order to inline SVGs into react components. This is required because the react-native Image component doesn't support svg files on iOS and Android. Rather we need to use react-native-svg to draw SVG using native primitives. In order to leverage the same react-native-svg components in electron together with react-native-web, I've created a PR to create-react-app:

facebook/create-react-app#4224

Once this PR is merged we should be able to use a single SVG format on all platforms. Inlining SVGs also has the advantage that we can style them using CSS and don't need to edit colors in Sketch.

I've already gotten the svgr compiler to work on a branch: 7ce81a2