Translation, link to article, field for group

[maartenheideman]

Great plugin, but:

1. How to translate firstName and lastName in the subscription form?
2. Is it also possible to add the link to the content in mail to the subscribers and a part of the content? These are not visible as tag like ##firstName##.
3. I'll want to use this in a content block (matrix field). It woud be great to have a custom field to pick the groupId out of the available ones.