ChaosLab: Add annotation to be used when adding new features to the lab.

This should be used when adding completely new features to ChameleonOS,
and not for simple things that expand upon a current feature.

Change-Id: I37d7250424967d41ecfb885120627f5397b2f804
Re-implemented app sidebar

Change-Id: I296059a3cc688a567e7e90cccfdf4b8e824cfedf
Make notification_header_bg a .9.png for better theming

Change-Id: I477872ac49b1bbb77e44b9aa9bedd4d27643ea4f
Use .9.png images for quick settings tile background.

Change-Id: I17cd77006e8da2fe629d63e0932c88041e81f07c