* Info.plist: Change the build base to 5.1 (iPad 1 limit).
Change default orientation.

* NathansWay.csproj: Remove for rename.

* AppDelegate.cs:
* ARNW_iOSGameCore.cs:
* NathansWay.iOS.Game.Core.cs: Namespace work. Restructure. Rename

* NathansWay.Numeracy.csproj: Rename the project to
  NathansWay.Numeracy. I will make each app under
  NathansWay.<applessontype>

* NathansWay.iOS.Game.Core.cs:
Move view/xib over to the tools foder.
Add new toolbox abstract class.