Merge pull request #20 from nicholsn/source

add: additional datasets to listing
add: blog post on NeuroDebian
Add NITRC-CE to NeuroDebian category ;)
rf: few fixes and moving text around
Merge pull request #21 from neurodebian/source

NeuroDebian blog post: looks pretty good, might change a few small things.
Merge pull request #22 from nicholsn/post/neurodebian

rf: few fixes and moving text around
add: new post on mystery challenge
rf: added first draft of challenge 3 text
Merge pull request #23 from nicholsn/post/the-3rd-challenge-and-mapping-to-mni

Post/the 3rd challenge and mapping to mni
add: post on mindboggle
rf: added all text to post
Merge pull request #24 from nicholsn/post/mindboggle

Post/mindboggle
add: post on INCF
rf: aded main text to incf post
Merge pull request #25 from nicholsn/post/incf

Post/incf
add: initial template for winners post
add: hackathon banner image
add: including presentations from finalists
rf: inserted text for post
Merge pull request #26 from nicholsn/post/winners

Post/winners