3.0.0 - Public API overhaul

This release contains significant changes to the public API.

• A more complete set of reflection APIs are exported.
• The default package name for generated code is based on the .proto file name.
• The way groups are handled has been simplified internally, and the groups API changed as a result.

There are many other changes as well. See CHANGES.md for details.

Version 2.0 of cl-protobufs

This is a Lisp library implementing Google's Protocol Buffers.
It supports all of proto2 and proto3, has a json and text-format
conversions. Uses lisp structs for the in memory protobuf type.