Added solution to knapsack problem to show ovl/tf combination. Test cases pass.
Added solution to knapsack problem to show ovl/tf combination. Test cases pass.

hewlettpackardlabs/opveclib,opveclib/opveclib,hewlettpackardlabs/opveclib,hewlettpackardlabs/opveclib,opveclib/opveclib,opveclib/opveclib