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