inital commit of mergewords.c
initial debug on mergewords, still not sorting
more work on mergewords; added heap operations, need bounds checking still
added bounds checking and heapify ops; buggy.
mergewords merging correctly now
mergewords tested and slightly optimized against search4.
added corpus_search.c
added corpus_next_hit
added search_stage_next_hit and corpus file initialization code
pre-loading first corpus hit
wrote stage_next_hit function.  need to straighten out fnc signatures to get it to compile
used a NULL db pointer to resolve the function signature prob in search checks--clean up later.  now compiles
main routine up-to-date.  init_stage functions are copying unnecesarrily.
added basic output arg handling
little more cleanup before merge
Merge pull request #232 from rwhaling/master

merge upstream