Closes #50 - Fix for CachingEpisodeDao.GetEpisodes

I think CachingEpisodeDAO.CacheResults(eps) is meant to return eps, but
it returned all cached episodes instead. This commit contains a fix.
Merge pull request #52 from johanv/50-working-fix_episode_cache

Closes #50 - Fix for CachingEpisodeDao.GetEpisodes