Add `HideSurroundingHtml` property to `ModelMetadata`
- #843
- add property as well as the related `[HiddenInput]` attribute
- use this property to address some TODOs in default display and editor templates
Address TODO item in default `object` editor template
- add validation elements per property in this template
- update editor template test to expect new `<span>` in result
Do not repeatedly evaluate `ModelMetadata.Properties` enumeration
- supports useful property updates of `ModelMetadata` instances in the collection
- provide a controllable ordering using the `Order` value
- part of #964
Add `[HiddenInput]`, `ModelMetadata.HideSurroundingHtml`, and `.Properties` tests

nits:
- add a few missing default `ModelMetadata` property value checks
- cleanup some redundancies in test data initializers
Changes to enable XML Output Formatters.
- Unit / Functional tests for the same.
JsonResult to use ObjectResult for content negotiation to pick default json formatter.
Implementing ILoggerFactory.AddProvider
Fixing sample
Adding Input Formatters to MVC Options and using HeaderValueAbstractions
Reacting to System.IO.FileSystem package version change
1. Moving input formatting related classes to MVC Core.(for tests as well).
2. Cleaning up the IInputFormatter to the final version.
3. Updating the input formatters and the context to be compliant with the IInputFormatter interface.
4. Adding Functional Tests.
- Not cleaning up TempInputFormatterProvider.

Conflicts:
	src/Microsoft.AspNet.Mvc.Core/Formatters/InputFormatter.cs
	src/Microsoft.AspNet.Mvc.Core/Formatters/JsonInputFormatter.cs
	src/Microsoft.AspNet.Mvc.Core/Formatters/TempInputFormatterProvider.cs
	src/Microsoft.AspNet.Mvc.Core/Formatters/XmlDataContractSerializerInputFormatter.cs
	src/Microsoft.AspNet.Mvc.Core/Formatters/XmlSerializerInputFormatter.cs
	src/Microsoft.AspNet.Mvc.Core/Microsoft.AspNet.Mvc.Core.kproj
	src/Microsoft.AspNet.Mvc.Core/ReflectedActionInvoker.cs
	src/Microsoft.AspNet.Mvc.ModelBinding/Microsoft.AspNet.Mvc.ModelBinding.kproj
	test/Microsoft.AspNet.Mvc.Core.Test/Microsoft.AspNet.Mvc.Core.Test.kproj

Conflicts:
	src/Microsoft.AspNet.Mvc.Core/Microsoft.AspNet.Mvc.Core.kproj
	src/Microsoft.AspNet.Mvc.HeaderValueAbstractions/Microsoft.AspNet.Mvc.HeaderValueAbstractions.kproj
	src/Microsoft.AspNet.Mvc.ModelBinding/Microsoft.AspNet.Mvc.ModelBinding.kproj
	src/Microsoft.AspNet.Mvc.ModelBinding/ValueProviders/FormValueProviderFactory.cs
	test/Microsoft.AspNet.Mvc.Core.Test/Microsoft.AspNet.Mvc.Core.Test.kproj
	test/Microsoft.AspNet.Mvc.ModelBinding.Test/Microsoft.AspNet.Mvc.ModelBinding.Test.kproj

Conflicts:
	src/Microsoft.AspNet.Mvc.Core/Formatters/FormattingUtilities.cs
	src/Microsoft.AspNet.Mvc.Core/Formatters/TempInputFormatterProvider.cs
Enabling basic input formatter selection.

Conflicts:
	Mvc.sln
	src/Microsoft.AspNet.Mvc.Core/Formatters/TempInputFormatterProvider.cs
	src/Microsoft.AspNet.Mvc.Core/Microsoft.AspNet.Mvc.Core.kproj
	src/Microsoft.AspNet.Mvc.Core/ReflectedActionInvoker.cs
	src/Microsoft.AspNet.Mvc.Core/ReflectedActionInvokerProvider.cs
	src/Microsoft.AspNet.Mvc/MvcServices.cs
	test/Microsoft.AspNet.Mvc.Core.Test/Microsoft.AspNet.Mvc.Core.Test.kproj
	test/Microsoft.AspNet.Mvc.Core.Test/ReflectedActionInvokerTest.cs

Conflicts:
	src/Microsoft.AspNet.Mvc.Core/Formatters/TempInputFormatterProvider.cs
Responding to comments

Conflicts:
	src/Microsoft.AspNet.Mvc.Core/FilterActionInvoker.cs
	src/Microsoft.AspNet.Mvc.Core/Formatters/DefaultInputFormatterSelector.cs