Added a fcnptr ctor for the btree so you can pass in a comparitor function
Added a fcnptr ctor for the btree so you can pass in a comparitor function

AeroNotix/algostructure,AeroNotix/algostructure,AeroNotix/algostructure,AeroNotix/algostructure,AeroNotix/algostructure,AeroNotix/algostructure