Create AuthManager protocol for authentication tasks

Updated Podfile and configured project for tests

Removed deprecated isStatusBarHidden, clean up AppDelegate

Add constraints to static cells in Settings view

Update profile picture constraints to set height using ratio to superview

Fix constraints to remove buildtime issues

Update Pods, fix related minor renaming issues

Change background colour of media viewer navbar to clear, white text

Fix LegalViewController navigation bar spacing bug

Add simple Photo Library save capability to Save button

Hide status bar for media viewer

Set navigation bar to toggle visibility upon image tap

Add UINavigationBar subclass to Media Viewer

Change New Conversation screen to dismiss keyboard upon search

Implement pinch to zoom in media viewer