Minor fixes
Merge branch 'master' of github.com:escoz/QuickDialog

* 'master' of github.com:escoz/QuickDialog:
  Fixes default alignment for entry and font for textelement
  update MacBuildServer button
  MacBuildServer Try button
  Check whether value is NSNull. When dynamically set property to nil, we must send [NSNull null] instead of nil which can't  be set as an NSDictionary value.
  Fixed an issue where, if the controllerAction was not set, but onSelected was set, the selection style of the cell was wrong.
  Fixed default QColorPickerElement items.
  Fixed bug in getImageFromItem: method.
  Fix QSegmentedElement display problem
  Fix CocoaPods build
  Forget to change it here. Sorry.
  Rev'd up podspec
  Deselect row when navigation controller pop