use <link></link> instead of <link /> in the rss feed
tweak the author bio: 'hide' @ in <span>
reconstruct the source link in a horrible way in liquid
use Dropbox to host images, so the configuration of _bin/knit is simpler

the R-Forge hack can also go away now
ignore the figure/ directory; _cache and _figures are no longer needed
rebuild posts
fix grammar problems and typos
add the list of contributors to the about page and clarify a few places
tweak the homepage
add Carl Boettiger
by last name, not by id