More small fixes
* calendar should not error when invalid date specified
* blockquote parsing weirdness
* obs/create was failing when invalid time zone specified
* tried to avoid some weird encoding issues with search
Bugfix: ofv change messed with tag parsing.
Allowed Life to be a community taxon, but not as a criterion for research grade.
Removed some OFV validations we can't really support right now.
Made obs?taxon_name=foo use Taxon.single_taxon_for_name.