Don't include static files in the build. (#43)

Define 'CONCATENATE_SCRIPTS' as false in `wp-config.php` and removes most static assets from the `wp.data` build script. This makes for an incredible size decrease from 44M to 13M. See #39 and #2 for more details.

Co-authored-by: Adam Zieliński <[email protected]>

Author: dd32