Make gen-i18n support 'HTML'
Make gen-i18n support 'HTML'

Where by 'HTML' I mean just run the same regex as riot does over
some text.

Also make it walk multiple paths.

This mostly means it can be used for riot-web.

matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk