implement per week display
exclude events in timetable
add flash messages to login (provision)

Added 'connect-flash' node-module for flashing of messages.
Added a simple header to layout.jade.
Commented out bootstrap.css, added CSS Reset on top of main.css.
add logout, changed login routes

Added /logout to logout.
Login.js now based on / instead of /login.
Prettified the header, navigation bar.
shift timetable router