added more robust error checking for date_convert() proper python exception handling
added proper exception handling for cidr_convert as well.
hopefully these will help speed up the code
changed whois server option back to -s because it conflicts with built in argparse --help
code cleanup of list_ip_blocks(), resulting in a slight speed increase
cleaned ip_block_list() added some comments
changing datastructures from nested lists to cross refrenced dictionaries.
noticed some big performance gains. asn ipblocks are now stored in a dictionary
All base list types only contain parsed file lines, while mined data is now stored in dictionaries
minor formating change
updated nmap routines for new data structures, WIP, untested
added more try/except exception handling. This time the file_meta class is used directly to check if we have valid data
some basic code clean ups, and deleted unneccary items and a whitespace line