Merge pull request #436 from lring/develop

Fix to make videocalling work with hangout update, added logging, and fixes to issues listed below
Update Nutrition and Exercise
Add "Other" to family relations
Update docs
Added error codes to the methods in face detection return values.
Updated the FaceDetection (using Shore) instruction.
Added cvCapture structure's initialization failure check.
Handle camera errors without crashing
Change comment
Add delay for Shore start after Hangout
hangout fixes.