Accepts G+ username instead of full URL, adds Google authorship as per https://support.google.com/webmasters/answer/1408986?expand=option2
Site.owner.avatar now accepts local images and hotlinked images (conditional on http://, https:// in string)
Revert google change
fix google plus integration in bio, now accepts username
revert some change
Make google+ expect handle, not full url for head and author-bio
Merge pull request #30 from maxheld83/gplus-handle

Accept Google+ handle instead of full URL for bio link and authorship stuff