BREAKING CHANGE: Match the component names to the structure recommended
by the Vue style guide. This means all files now begin with a capital
letter, i.e. "android.vue" is now "Android.vue", and the component
names are Pascal-cased instead of camel-cased. i.e.
"CheckboxMarkedCircle" instead of "checkbox-marked-circle".

Other changes include:
- Async build script, to make it a little faster. Also refactored to
  use the new @mdi/svg repo, so some of the build hacks can go away.
- Added some testing and snapshots, to make upgrades quicker to verify.
- Updated to the lastest version of MDI for more icons.
- Updated the LICENSE for 2018
- Added .nvmrc
- Fairly unimportant, but the generated .vue files now pass all the
  rules on the Vue style guide; this should make them a little more
  consistent and easier to read for those familiar with Vue.

Fixes #1, #2