o Added optional routine GPTLinit_handle(). Invoking this routine initializes
  the second argument ("handle") to the hash value of the first ("name").
  The advantages of this routine are: 1) It helps eliminate some of the library
  overhead ascribed to the region being timed; 2) It can be called
  outside threaded loops where GPTLstart_handle() and GPTLstop_handle() may
  be invoked, thus eliminating the one-time overhead of multiple threads
  computing and writing to the user-provided hash index.

o Should have been in previous commit log: Improved hash algorithm. See
  ifdef NEWWAY in gptl.c Even if NEWWAY is undefined the algorithm is better
  than previously.