Add UI for choosing from mapping options

Addresses #407. This provides exact-match-only "quick mapping" and more
intense "careful mapping", which includes approximate matches and offers
a choice to the curator. Currently the choice is automatic: bulk mapping
is always quick, single-taxon mapping is more careful.
Changing button 'Map carefully' to 'Fuzzy matches'
Merge pull request #414 from OpenTreeOfLife/otu-mapping-quick-vs-careful

Add UI for choosing from mapping options (first attempt), for Cavia