Fixing issue #233 - adding content type override for feed.xml.

This sets the content-type to application/rss+xml
Prettying up the table and html on the 90 second pitch page.
Merge pull request #240 from gvwilson/master

Blog post about record-and-playback in the IPython Notebook.
Merge pull request #241 from gvwilson/master

Fixing typo in FAQ.
Merge pull request #238 from jiffyclub/90-seconds-pretty-table

Prettying up the table and html on the 90 second pitch page.
Merge pull request #244 from gvwilson/master

Adding link to setup instructions to Columbia boot camp page.
Blog post about how to become an instructor
Merge pull request #246 from gvwilson/master

Blog post about how to become an instructor.
New blog post from Joshua Peterson, and fixing category of post from Hanah Chapman
Merge pull request #248 from gvwilson/master

Blog post from Joshua L. Peterson
Updating instructions for AMOS
Merge pull request #249 from gvwilson/master

Updating setup instructions for AMOS
blog/2013/01/visualizing: Link to "Categorization of Used Nuclear..."

If we reference a paper, we might as well link to it.  Hopefully the
ornl.gov link will be pretty stable.
Merge pull request #250 from wking/nuclear-fuel-link

blog/2013/01/visualizing: Link to "Categorization of Used Nuclear..."
Adding readings to pulldown menu
Merge pull request #251 from gvwilson/master

Adding the bibliography to the pull-down under 'About'
Added in french translation of Paris bootcamp page.

Some parts came from PR 239, and others I translated myself...
Merge pull request #236 from pipitone/fix_rss_content_type

Fixing issue #233 - adding content type override for feed.xml.
Adding a Bootstrap table class to table on AMOS boot camp page.

So we can avoid invalid <p> tags around the table.
Adding a Facebook link in the footer.