Fast IPv4 and IPv6 primitives and parsers for .NET.

• Works in netstandard2.0
• Supports multiple formats of IPv4 and IPv6 writing
• Conversion to and from .NET's IPAddress type
• Tokenized parsing of addresses
• Structures to determine well known IPv4 and IPv6 addresses (WellKnownIPv4 and WellKnownIPv6)
• Support parsing, writing and handling of CIDR-style notation of networks
• Supports calculations based on networks such as:
  • Contains sub networks and addresses
  • Comparsions of networks and addresses
• Network creation and splitting
  • Make the smallest common network for a set of IP addresses (supernets)
  • Split networks into N new subnetworks