Tests for deleting users.

These simple tests just checks that the list of users includes links
to delete and that when clicked they are removed from the system.
Add tests for password field.

Do not allow password fields to be provided using text fields since
the text is visible on screen.
Merge https://github.com/geisler/game_contest_server into dev
Add Bootstrap to Gemfile.
Merge https://github.com/geisler/game_contest_server into dev

Conflicts:
	Gemfile.lock
Merge bootstrap
Formatting with Bootstrap