Add icons and flash status
Integrate Nova SDK

Attempt to fire flash using the current settings any time the
capture button is tapped.

Maintain an abstraction layer in front of NVFlashSettings as
SSNovaFlashSettings is a closer match to our UI and handles
translation of brightness/color temp to warm/cool values.
Setup and enable flash immediately

Testing flash unit; in the future we should enable flash only when the
capture screen is active and when the flash is turned on.
Enable testing of flash from flash settings
Update flash status icon to match device status
Enable and disable flash unit when appropriate
Add first/second curtain to shutterHandler

Call shutter handler twice: both first and second curtain
Refactor SSFlashSettingsVC; add reference to SSNovaFlashService
Update flash status on flash settings menu
Merge branch 'feature/nova-sdk-integration' into develop

Conflicts:
	NovaCamera/ViewControllers/SSCameraViewController.m
	NovaCamera/ViewControllers/SSLibraryViewController.m
Turn off flash when app goes into background
Move flash 'end' command to capture completion callback

Attempting to debug delay issue but this still doesn't solve it
Merge branch 'develop' of github.com:nova-device/nova-ios-app into develop