Various cleanups etc.
Merge branch 'master' of github.com:urbit/urbit.github.io

Conflicts:
	_posts/doc/2013-11-18-urbit-is-easy-ch7.markdown
this builds
Minor fix.
Chapter 8 draft.
more chat blog
Merge branch 'master' of https://github.com/urbit/urbit.github.io
fix ch8
tiny fix
another fix
last fix?
fixed whitespace