Pulling the latest updates to the 3_0 and 4_0 lessons.
Fixes incorrect redirects on images in 4_0 material
Temporary rewrite rule for an old url published for an upcoming bootcamp
Merge pull request #214 from gvwilson/master

Regularizing menus: the 'Lessons' and 'Badges' items are now also pulldowns (to be consistent).
Merge pull request #215 from gvwilson/master

Blog post about Montreal boot camp
Merge pull request #216 from gvwilson/master

Adding picture from McGill boot camp to FAQ.
Page for April 2013 boot camp in Paris
Updating description of Columbia University boot camp