Alpha 10 commits

Changelog:
1. Night mode: Automatically disable gesture recognition when you go to
sleep and automatically enable it when you wake up. To set the wake-up
and sleep time, enable Night Mode in Settings and set the wake-up and
sleep timings. This saves battery life substantially.
2. Inbuilt QuickCapture camera app:  Not exposed to user yet because
it's not fully ready for testing
3. Optimizations to code and some bug fixes
4. Improvements to Gesture Calibration: Added a help button﻿