v0.0.4

Changelog

561b39a cmd/cue: improve error messages for unknown commands
05fbfe4 cue/errors: make List implement Error
a68a786 cue/errors: remove List from public API
7b7ccdd encoding/openapi: add FieldFilter option
4de93e1 encoding/openapi: add Info and DescriptorFunc features
865f159 encoding/openapi: change naming in line with standard
0a97533 encoding/openapi: correct typo
c89f5a6 encoding/openapi: make OrderedMap type opaque
f94a548 encoding/protobuf: make names consistent with new convention
c891137 encoding: adopt naming convention for conversions