Added fa icons to the sidebar
Added dropdown menu for projects
Added Autograder and Office Hours to sidebar
Fixed Autgrader/Calendar bug on the sidebar. Projects dropdown is activated if url is /#projects.
Changed images on the home page to colored tiles.
Added (empty) staff page
Changed tile color on the home page
Removed the gap between the image and the tiles
Centered background image (#2)
Changed to relative path for ajax loading
Merge pull request #14 from maxim123/master

update