Support for thinking_sphinx 3, rails 4.0.0.beta1, ruby 2.0.0p0

1) @ts_config.generate/@ts_config.configuration no longer necessary
2) thinking_sphinx namespace is gone in favor of ts (see https://github.com/pat/thinking-sphinx/issues/468)
3) apparently ts:reindex isn't a valid rake task anymore 

Thanks!
James Hill