- Add new PNG files for the new icons in the left side navigation and the right side labels on the Hosts page.
- Rename the old `<Icon />` component to `<KolideIcon />` and create a new `<Icon />` component. The ultimate goal is to get rid of the `<KolideIcon />` and `<PlatformIcon />` components and use the encompassing `<Icon />` component for all icons. The full transition will be made when we have icon assets to replace all the kolide icons and platform icons. Currently, we don't.
- Rename the `icon_name_for_label.js` utility to `icon_name.js` because the utility now includes `iconNameForLabel()` and `iconNameForPlatform()` functions.
- Fixes issue #127.
