Small fixes, typos etc.

Signed-off-by: Lee Sheng <lsheng@wibidata.com>
Adds generated song play data for distribution.
Clean up comments in the code.

Signed-off-by: Juliet Hougland <juliet@wibidata.com>
Small fixes to comments.
Packaging improvements for kiji-music

Signed-off-by: Juliet Hougland <juliet@wibidata.com>
Modify example release to include ddl layout file.
Adds example data to project distribution.
Move example data to /example_data in output package.