- Fix bug where new install was relying on the migration to run on
startup to fix up the default config
- Moved save/load functions into state.js
- Removed exported getInitialState, getDefaultSavedState since that's
leaky. The state module should take care of that.
- Put migrations into a separate file: migrations.js
- Add semver, for more specific version-based migrations.
- Change `state.saved.version` to semver app version.
