Add Mega article to reading section
Update schema with defaults
Merge branch 'master' of github.com:github/swordfish

* 'master' of github.com:github/swordfish:
  formatting
  Use base64 from forge
  Fix typo
  reverting changes to db/schema.rb
  add/delete files
  moving to forge for aes
  Add info on joining the core team
  draft of core team docs