valgrind fix for basic_unary_col_adder (memory leak)
started implementing some of the process_token(double) functions.  30% speed improvement.
made my own double to string conversion function, based on https://code.google.com/p/stringencoders/wiki/NumToA.  HUGE improvement in speed (>50%) speed up for my test case.  With other improvement, about 70% speed improvement.