Convert all #include guards to #pragma once statements
  -- Required small change in most USML header files.
  -- Recompile everything in release mode.
  -- Re-ran usml_test executable.
  -- Closes #77.
Get USML to compile under Windows VC++ 10.0
-- Replace use of gettimeofday() with Boost timer.
-- Cleanup print statements and source code formatting.
-- Add symbol for USML_DLLEXPORT to usml_config.h
   Used to export templates from DLL in windows.