Remove stop words from query

We need to remove stop words from queries in HibernateConceptDAO. You can get a list of stop words by calling conceptService.getConceptStopWords

Note that they shouldn't be removed from a phrase query i.e. a query in quotes, which you can find for example in one of the boost elements in HibernateConceptDAO.newNamesQuery

We won't be removing stop words from the index since they differ for different locales and I don't know of a way to create such an analyzer. If you do know how to do this, feel free to implement it. Otherwise we will investigate it later on.