Message: add TOOL_QUERY, TOOL_RESPONSE Type values
cleanup obsolete comments
.gitignore: also ignore protobuf .pyc files
QuietTextFormat: reject messages with unknown Message.Type values
Merge branch 'master' of dnstap.pb
dnstap.pb.go: recompile
dnstap/main.go: add TQ and TR abbreviations to help output
QuietTextFormat: handle Message.Type values TOOL_QUERY, TOOL_RESPONSE