add more express search related searches.
only include related express searches that are marked active in express
search config in the available related searches api endpoint.
monkey patch collectingEvents relationship into locality
support multiple "definitions" per related search class.
try adding definitions to related searches. not so good.
switching express search to sqlalchemy.
switching express search related search to use stored queries code. not finished.
fix ordering of fields in related express search.
code clean up.
use SQL union to combine instances of related express searches.
add idField to abstract datamodel and strict mode for get_field function.
support query fields that reference other fields.
add back in support for filters in related express searches.
use metaclass to inject static values during related search initialization.
exclude null localityalias from related search
add remaining related express search definitions.
use context manager for sqlalchemy sessions.
fix related express search LocToCO name
re-enable querycbx search api
fix exception from nonexistent saveblockers.