Update to add new status bar style

Added UIStatusBarStyleLightContent as an option for status_bar_style, a new option added in iOS7.

lib/motion/project/template/ios/config.rb

@@ -252,6 +252,7 @@ module Motion; module Project;
         when :default then 'UIStatusBarStyleDefault'
         when :black_translucent then 'UIStatusBarStyleBlackTranslucent'
         when :black_opaque then 'UIStatusBarStyleBlackOpaque'
+        when :light_content then 'UIStatusBarStyleLightContent'
         else
           App.fail "Unknown status_bar_style value: `#{@status_bar_style}'"
       end