Not really sure why this stopped working in prod...
Pinterest button on obs/show, more meta tags.
Merge branch 'master' of github.com:inaturalist/inaturalist

Conflicts:
	app/views/taxa/_chooser.html.erb
Terrible typos.
Bugfix: broke trips with my meta tags.
Attempt to fix #406, plus typo fix.
Attempt to fix #409.