Fixes an issue with undefined QElement types crashing app
adjust width for ipad screen

When iPad show splitview,shouldn't use screen width,should use tableview width.
Fix and improve issue #481. Refactor handling of changed values. Add support to fire onValueChanged for controls that have user-change actions like Segmented, Boolean, Date, Multiline, Float & Decimal controls.

The onValueChanged is fired for all the above, but handleEditingChanged for some few.
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
Minor null checking
Fixes disclosure accessory display
Small fixes for dynamic section
Changing QDecimalElement to a NSNumber instead of a float, so it's easier on binding
Fixes little issue with float on sample
Nil handling on ticks
Merge branch 'master' of https://github.com/escoz/QuickDialog
Allow section footers to be updated after their initial creation
Updated Podspec to infer git tag from pod version
Merge pull request #523 from Ashton-W/patch-1

Updated Podspec to infer git tag from pod version
Merge pull request #516 from davegurnell/master

Allow section footers to be updated after their creation
Merge pull request #484 from iamdaiyuan/master

Adjust section title width for ipad
renamed a property of QDecimalElement "floatValue" to "numberValue" in compliance with convention
Merge pull request #502 from mamcx/master

Refactor handling of changed values. Add support to fire onValueChanged to the rest of controls
Merge pull request #524 from ddwang/master

changed property name of QDecimalElement from 'floatValue' to 'numberValue'