Updated feedjira gem from 1.1.0 to 1.2.0
Updated simple_form gem from 3.0.1 to 3.0.2
Updated sass-rails gem from 4.0.2 to 4.0.3
Updated rubyzip gem from 1.1.2 to 1.1.3
Updated active_admin gem (to latest github master version) and rails from 4.0.4 to 4.1.0
Use Spring (new in Rails 4.1.0) as application preloader.

For more about it see:

http://edgeguides.rubyonrails.org/4_1_release_notes.html#spring-application-preloader
http://edgeguides.rubyonrails.org/upgrading_ruby_on_rails.html#spring
Moved secret_key_base for each environment to the (new in rails 4.1) secrets.yml file. This file is not uploaded to github.
Fix unit test.

The new feedjira version does not have the old bug in which xhtml content was wrapped in an extra div.
Moved Devise secret key to the (new in Rails 4.1) secrets.yml file.

This means that the devise.rb initializer no longer contains any sensitive data, and can be under git control.

Also it's no longer necessary to keep a separate version of the file for the CI environment.
Added secrets file for the CI environment.