Read the `secret_key` value from Rails `secret_key_base`.

It is possible to override this by setting the `secret_key` manually
on the `devise.rb` initializer on your application.
Merge pull request #2835 from plataformatec/secrets

Add support for Rails 4.1 secrets.
Correct misspelling
Merge pull request #2842 from slant/patch-1

Correct misspelling
Fix homepage's schema
Merge pull request #2843 from willnet/patch-1

Fix homepage's schema