Update wrong comment
Not passed variable in JavaScript is undefined, not null

Fixes #961
Merge branch 'master' of github.com:forkcms/forkcms
Implement missing getLandingPage method - Fixes #953
Save language in profile settings. Fixes #648
Make sure emails can be send from backend.

It's a rather dirty hack, but I'm planning on refactoring the full email
process in Fork (using SwiftMailer), so this can be enough for a
temporary solution.
Add bugfix to changelog.