- Remove sketch-namespaced attributes.
- Remove unused groups, and cancel out unnecessary transforms.
- Use overlap to avoid rasterization artefacts in the logo.
- Extend comment for `#logo` click event handler, as it's a non-obvious hack for Safari.
- Remove viewBox parameter and define paths in their final form.
The logo is now rendered as pure SVG, rather than image referencing a
svg. The SVG has an id and the shapes of the logo have a shared class.
The shapes change their fill color on hover with a transition.