Zee Zsh Zings

Here are various patches, etc, I've written for the Z shell.

• metaflac completion function - metaflac is a comand-line program to modify the metadata in FLAC files, see Xiph.org for details on FLAC.
• vorbiscomment completion function - vorbiscomment is the equivalent of metaflac, but for .ogg files. It also has many fewer options.