Allow the user to activate FLOPS/RAM measurements
Now, one can select which kind of measurements are taken by calling the member functions %measure_flops, and %measure_memory of a timer_t object. For example type(timer_t) :: timer call timer%measure_flops(.true.) call timer%measure_memory(.true.) call timer%enable() An explicit ftimings_init() call is now no longer necessary, PAPI will be initialized on the first %measure_flops(.true.) call.