0.3.1-pre
Amend "Export distributables as modules"

Amend 77933d613293cfe9c6b3ffe01939cfee1499d1e1 including missing file
`src/build/intro_supplemental.js`.

Fixes #8
Update README content

- Add "How to get CLDR JSON data" examples;
- Move Browser Support up into About section;

Fixes #6
0.3.1