Product share: Add support for native OS sharing#30

It would be great if we could customize it and offer the possibility to share the product page by e-mail, via Instagram, via Pinterest or by copy pasting the URL. So far the product page can be shared only on Pinterest, Twitter and Facebook.

Just wanted to drop in a quick message that Instagram doesn’t currently have an API for sharing to Instagram, so at this time that option isn’t possible. Others are though, thanks for your suggestions!