Initial Security Commit

Added BioPublicBundle and secured all other bundles.
Logout

Added ability to logout that matches the biology departments style.
Also added a title to the header that shows the course number and name.
Hide admin links

Sidebar now recognizes if user is an admin and changes display based on
that. Displays admin routes as defined in sidebar.yml if signed in. And
folder, files, and links if user is signed out.
Merge pull request #6 from dmhurley/security-branch

Security branch