Turned featherlight.js into UMD module

[MikhailRoot]

Now we can use it in ES6 code like import 'featherlight'; and it will not say there's no jQuery if you use webpack.
No code inside Featherlight itself was changed, just wrapped into UMD loader.

[marcandre]

Thanks for the PR!
Please note that I'm currently travelling, so I probably won't be able to check this out as quickly as I'd like, but I will.

[MikhailRoot]

Hi @marcandre I've wrapped featherllight.gallery in UMD as well for convenience.
NB: minified js files in /release are not recompiled. i've changed just sources.

[baezor]

Hope the PR can be merged soon! Would be great use it as UMD module.

[jontro]

Any status update on this? Edit: I can confirm that this pull request works. The minified files needs to be rebuild of course

[marcandre]

Thanks for the ping!
Merged and released. Thanks for the great PR.

[Coysh]

Hi all,
Wondering how the gallery works?

import featherlight from 'featherlight'; seems to work for me - but I can't figure out how to import the gallery.

[jamaluddinrumi]

Hi all, Wondering how the gallery works?

import featherlight from 'featherlight'; seems to work for me - but I can't figure out how to import the gallery.

anyone, any idea?