about to radically change merge
new version of merge, about to try
merge working, WITH COUTS
added comments
thought I'd be a smartass and find a faster way than copying vector in merge - doesn't seem to be going anywhere. committing it here in case anyone wants to come back to it at some point.
got rid of mergefast
adding files and apparently some modifications to insertionsort.cpp I hadn't yet saved - but this might be trivial