add parsing of https://www.brid.gy/users to get domains

bear

snarfed

here's a dump: https://snarfed.org/bridgy_domains_20140917.txt in case we want to do this again, here's the remote_api code i ran to generate this (in the bridgy repo root dir): ``` py import handlers, itertools for e in itertools.chain(*[cls.query() for cls in handlers.SOURCES.values()]): for d, u in zip(e.domains, e.domain_urls): print d, u ```