Add support for running on passenger

This requires at least faye 1.0, so we need to bump the dependency.
Because the passenger support does not use an adapter, we need a smal
workaround for that.
Update to faye 1.0.1 assets, fix spec
Add passenger example to README
Remove source-map reference from faye.js

See issue #15, this will either cause assets:precompile to fail if we
include the source-map or cause 404 errors if we don't, but leave in the
reference. So instead just remove the reference to solve both issues.