Merge pull request #11 from abliss/master

Replace some tabs with spaces.
small fix
Merge branch 'master' of https://github.com/urbit/urbit.github.io
another small fix
fix typo
Merge pull request #12 from JohnMcLear/patch-1

fix typo
Ignore junk OS X files.
Merge pull request #13 from xtian/osx-junk

Ignore junk OS X files.
Small correction in chapter-4
Merge pull request #14 from gajon/master

Small correction in chapter-4
removed extra bracket
Merge pull request #15 from fanuo/master

removed extra bracket
add missing closing bracket
Merge pull request #16 from christophgysin/master

add missing closing bracket
spell check
Blogpost.
posts now display authors
blog post Hi Zod, or basic Urbit tunneling
syntax error in yaml date field, got rid of it
formatting is fscked, why?