Adding a common group of :test and :development.

This gets rid of the warning message saying "Your Gemfile lists the gem
sqlite3 (>= 0) more than once."
Adding myself to seeded administrators.
Users are seeded with correct password confirmation.
Flash's are rendered within page content.

This allows the flash messages to contain content that span more than
one line. This was previously not possible, as the messages was
contained within the header, which has a fixed height of 70ox.
Extending the message to unregisted speakers.
Logout button now has a norwegian label.

.. as everything else on the page.
Adding a menu item for suggesting talks.
Automatically hide the menu item for suggesting talks.

This menu item is now automatically hidden after the deadline for
suggesting talks has passed, which is 2014.10.01.