Bugfix: grid/small widgets for obs weren't working.
Tried to add nofollow to all parameterized links.
Merge branch 'master' into i18n

Conflicts:
	app/views/listed_taxa/_guide.html.erb
	app/views/listed_taxa/show.html.erb
	app/views/taxa/index.html.erb
	app/views/taxa/show.html.erb
	app/views/welcome/index.html.erb
	app/views/welcome/index.mobile.erb