Use NSUUID for hydra.uuid instead of calling external command
Merge pull request #248 from jhgg/master

Use NSUUID for hydra.uuid instead of calling external command
Merge pull request #249 from jhgg/audio

Document audio API
Pretty print docs.json & co.

Will make it so that the git diffs are actually helpful for these
files, to see what docs changed, instead of having them all on one
line.