Improved user messages

[klokan]

• Verification notice:
  Add bellow a new line/block: "Please check your email and click on the confirmation link."

- [ ] Email - add information about the "site" / "base_url" ("beta.kartenportal.ch"). Details TODO.

[klokan]

Visible messages can be changed in:
https://github.com/klokantech/jekylledit/blob/master/javascript/src/lang.js

Email (but we need base_url):
https://github.com/klokantech/jekylledit/blob/master/app/jekylledit/templates/auth/verify-email.txt