Added support for getting sleep details from snapshot data. This depends on my recent update to the 'jawbone-up-ruby gem (version 0.0.6).
Made two bug fixes.
- Corrected a minor typo in the light sleep summary metric.
- Changed the scope of sleep_summary_message[] to prevent it from being considered a String object in some cases.
Merge pull request #2 from RyanFrantz/master

Mod to support gathering sleep activity details.