Issue #2333375 Format Price field using NumberFormatter.

- Use the commerceguys\intl library for formatting the price field.
Added links to mentionned projects
Merge pull request #82 from JulienD/patch-1

Added links to mentionned projects
Merge pull request #81 from Jbekker/commerce-price-use-formatter

 Issue #2333375 Format Price field using NumberFormatter.