cdx field renaming: canonical cdx field name changes
statuscode -> status
mimetype -> mime
original -> url
old names still accept for query/filtering, however, cdx json will use new names
ensures consistency between .cdxj field names and names used by cdx server json output
collections manager now creates .cdxj by default
bump version to 0.9.0b2!
fuzzy matching
test local cdx server, remote cdx source, local and remote filtering
with self-contained unit tests
map remote cdx httperrors to pywb exceptions