Remove incomplete ModalWindow implementation for release
Fix compilation error
Add DateTimePicker tests, and fix issues. Fixes #87
WinForms: Setting value outside of Min/Max date bounds should not throw an exception, but rather just limit to date range
Gtk: Fix sizing of DateTimePicker on some platforms, and restrict date instead of showing that it is invalid (red)
Mac: Re-enable clearing of the date with Cmd+Delete key
Remove incomplete DrawableCell for release
Wpf: Update Extended Wpf Toolkit to use newer DateTimePicker. Almost works, so still need to work around clip issues with the mouse.
Mac: Fix setting DateTimePicker.Value to null
Update nuget packages to only have LICENSE in nuget package folder instead of adding to project. Fixes #207
Merge branch 'release/1.3.0' into develop

* release/1.3.0:
  Update nuget packages to only have LICENSE in nuget package folder instead of adding to project. Fixes #207
  Mac: Fix setting DateTimePicker.Value to null
  Wpf: Update Extended Wpf Toolkit to use newer DateTimePicker. Almost works, so still need to work around clip issues with the mouse.
  Remove incomplete DrawableCell for release
  Add DateTimePicker tests, and fix issues. Fixes #87 WinForms: Setting value outside of Min/Max date bounds should not throw an exception, but rather just limit to date range Gtk: Fix sizing of DateTimePicker on some platforms, and restrict date instead of showing that it is invalid (red) Mac: Re-enable clearing of the date with Cmd+Delete key
  Fix compilation error
  Remove incomplete ModalWindow implementation for release

Conflicts:
	Resources/Publish.targets
	Resources/nuspec/Eto.Json.nuspec
	Resources/nuspec/Eto.Platform.Direct2D.nuspec
	Resources/nuspec/Eto.Platform.Gtk.nuspec
	Resources/nuspec/Eto.Platform.Gtk3.nuspec
	Resources/nuspec/Eto.Platform.Mac.nuspec
	Resources/nuspec/Eto.Platform.Windows.nuspec
	Resources/nuspec/Eto.Platform.Wpf.nuspec
	Resources/nuspec/Eto.Platform.XamMac.nuspec
	Resources/nuspec/Eto.Xaml.nuspec
	Resources/nuspec/Eto.nuspec