Added class Dummy_argparse for python 2.4/2.6 compatability, Performance data updates

For python 2.4/2.6 compatability
* added the class Dummy_argparse for Python 2.4/2.6 compatibility
* check if class sys has the attribute maxsize, use constant 2^32-1 if not
* Performance data now outputs raw counters
* Performance data only put the warn/crit levels in the 1st set of values
* changed name of /var/tmp file to check_iftraffic_nrpe_stats.dat