* added fast scan method to Searcher which scans for query matches, ignoring   scoring and writing results straight to a buffer.
* added fast scan method to Searcher which scans for query matches, ignoring
  scoring and writing results straight to a buffer.

      int isea_unscored_search(IndexSearcher *searcher,
                               Query *query,
                               int *buf,
                               int limit,
                               int offset_docnum)


git-svn-id: 26a6d2a58b162bc133329b2f36847a121ee54040@907 06fd6eb0-0002-0410-a719-e5602cce40bc

Bira/ferret,jkraemer/ferret,Bira/ferret,dbalmain/ferret,dustin/ferret,Bira/ferret,dimelo/ferret-dimelo,dimelo/ferret-dimelo,Bira/ferret,dbalmain/ferret,dustin/ferret,dimelo/ferret-dimelo,dbalmain/ferret,jkraemer/ferret,jkraemer/ferret,jkraemer/ferret,dbalmain/ferret,dimelo/ferret-dimelo,jkraemer/ferret,dbalmain/ferret,dustin/ferret,dustin/ferret