Resolving more community issues

Bug fixes

Fixed issue where defanging automatically defaulted to the http/https protocol. Now allows the user to define this functionality. (https://github.com/InQuest/python-iocextract/issues/34, https://github.com/InQuest/python-iocextract/issues/32)
Added the ability to extract IP addresses (IPv4) with a 4th octet (i.e. netstat output) (https://github.com/InQuest/python-iocextract/issues/31)
Updated email regex to now extract emails addresses with a first + last name structure (i.e first[.]last@email[.]com) (https://github.com/InQuest/python-iocextract/issues/36)

Added easier argparse options to allow a simpler version of pre-existing options
Minor improvements to IPv6 extraction