Fixes incorrect redirects on images in 4_0 material
Temporary rewrite rule for an old url published for an upcoming bootcamp
Making all the menus, menus
Blog post by Ross Dickson about Montreal boot camp
Adding picture from McGill to FAQ
Page for April 2013 boot camp in Paris
Updating description of Columbia University boot camp
Merging changes to submodule
Updating the how-to and adding how-not-to
Online office hours page
Uploaded the proper version of the online office hours etherpad pic
Fixed typo in about/faq.html

students -> studies
Fixed unmatched HTML tags in bootcamps/office-hours.html
Moved "License" navbar link under "About".

Also removed image from footer and added a "License" badge with the other
links in the footer. To-do: fix footer vertical spacing.
Adjusting footer spacing after removing the CC-BY image.