Bug 973926 - [Camera] Move from localStorage to cookies for settings persistence

--amend
Bug 974337 - [Camera] Display all pictureSizes in settings
Bug 974119 - [Camera][Madai] 1.4 Viewfinder size and alignment
Bug 975802 - [Camera] Separate front/back picture/video size settings
Bug 976407 - [Camera] Only update the preview-size if the resolution for the current mode is changed
Bug 976875 - [Camera] Camera app launch with black screen in Settings/SMS apps
Bug 971086 - [Camera] 1.4 Visual Design - Image Capture/ Video Buttons
Bug 966837 - [User story] Add self-timer to camera settings
WIP - Bug 933902 - [Camera] 1.4 Add zoom functionality

Removed debugging code.

Added CSS scale adjustment to zoom.
Added configuration setting to enable/disable zoom.
Removed min/max zoom constants - getting from mozCamera API instead