when the server doesn't support web sockets connect with event source
comment fix
Merge branch 'master' of https://github.com/ayende/ravendb into RavenDB-2457
Merge branch 'RavenDB-2457' of https://github.com/grisha-kotler/ravendb
Merge branch 'master' of github.com:ayende/ravendb into RavenDB-1661