Email class / Swiftmailer

[Jelmer Schreuder]

Another idea for the email class: completely remove it from the core and offer an official Swiftmailer package. As a package because Swiftmailer's LGPL license is incompatible with MIT and thus it needs a separate license. We could document it in the docs and have the package in fuel-packages so we don't have to wait for Cells.

Emailing isn't easy, especially to get it done reliably and capable of bulk emailing. Even if we integrate a very simple alternative in the core it'll probably grow into a beast within a short timespan. Offering Swiftmail as a package would allow us to keep focussed getting the whole of the framework stabelized. Unless any of you guys has negative experience with it? (I've only used it once)