More waiting for well known types

This is quite a stable point for gogoprotobuf.
proto 3 support is limited, since it does not include support for well known types.
Compatibility with go 1.4 up to 1.7 is tested.

Still waiting for well known types to land

This is quite a stable point for gogoprotobuf.
proto 3 support is limited, since it does not include support for well known types.
Compatibility with go 1.3.3 up to 1.6 is tested.

An initial release

This is quite a stable point for gogoprotobuf including many gadgets.
proto 2.6.1 and 3 support are limited.
Compatibility with go 1.2 up to 1.5 is tested.