Files panels implementation

Install NuGet CLI

Adjust NuGet package

Initial implementation

Add build badges into Readme files

Update documentation

Increase code coverage

Reduce Roslyn version. Increase code coverage

Attribute to skip property type replacemen

Replace property type with read-only interface

Read-only types of properties

Add nullable directive

Fix some warnings

Add code coverage report

Change NuGet package properties

Augment NuGet package

NuGet icon

Push NuGet to MyGet

AppVeyor integration