asset list: display institutions using their lookup name

Add a list of institutions keyed by instid to the redux store and add a new action, listInstitutions(), which will populate it.

Add a LookupInstitution component which renders a lookup instution given the lookup instid falling back to using the instid.

The initial fetch is triggered by a FetchLookupInstitutions component which will cause a fetch of institutions on first render if a fetch had not previous occurred. This component is rendered outside of the router component since it should only fetch on first page load, not on navigation.

Closes #57 (closed).