use to_yaml instead of handbuilt serializer
Merge branch 'master' into to_yaml_for_frontmatter
update iframe spec expectations to to_yaml format
Merge branch 'master' into to_yaml_for_frontmatter

Conflicts:
	spec/lib/wp2middleman/migrator_spec.rb
Merge pull request #14 from bensheldon/to_yaml_for_frontmatter

Use to_yaml instead of handbuilt serializer