Support for npm

[Bnyro]

It would be great to be able to use EFY with the node package manager instead of having to download and update the code manually each time features get added/improvements get made, see https://docs.npmjs.com/creating-and-publishing-scoped-public-packages for reference.

Benefits would be that

1. updates can be done easier
2. it'd improve the code structure in a project that uses EFY because it doesn't require having a efy_ui folder inside

Cheers