Set target sleep rating & receive recommended duration.

From Anonymous on 2017/10/03 07:42:39 +0000

Based on data collected regarding duration and sleep rating, find a correlation and use this to predict the duration required for a given sleep rating. Additionally, predict the rating for a given alarm time as well perhaps

Copied from original feature request: http://urbandroid.uservoice.com/forums/264867-sleep-as-android/suggestions/31738024-set-target-sleep-rating-receive-recommended-dura