* Add ECS processing. See #46
* Add support for Padding. Simplify ECS to not do CIDR parsing.
* Done implementing the EDNS0 options that make sense
* Default to string values from IANA for EDNSO option codes. Add tests for mappings.
* Add a few more aliases for option codes
* Update README for EDNS0 options
* I think this is what is desired. Happy to change it more if you want.
* Address code review comments from @silverwind
