Refactor app to use AppSettings.h
VIP App Styling Version 1

Adds:
  - VIPColor class to allow for easy customization
    by loading global colors from settings.plist
  - UIColor category providing Hex string color parsing
  - UIImage category providing image scale functionality
  - VIPViewController and VIPTableViewController to handle
    global view styling (such as the bg image)

Styling changes:
  - Nav bar default color
  - Nav bar home icon
  - Tab bar background colors
  - Tab bar selected/standard images/text colors
  - App background image scales with screen size
  - Semi-transparent Table view cells based on primaryTextColor
  - Set app primary/secondary text colors in views
  - Set/Scale polling map icons
  - Set/Scale polling list icons
  - Set segmented control tint color == primaryTextColor
  - Update social media icons
  - Update candidate default blank image icon

Also reverts all Storyboard styling to defaults.
If we are going to allow for customization of the app style
via configuration settings, we need to do all our styling in code.
Merge branch 'feature/app-styling' into develop
Merge branch 'develop' of github.com:votinginfoproject/ios7-white-label-app into develop