dev: makes ReferenceCollector non-thread-safe.
refactor: extracts the CreateFixture method in AutoFixtureFactory.
refactor: deletes the unused DelegatingSpecimenContext class.
dev: lets AutoFixtureFactory introduce the protected CreateFixture

method.
docs: deletes the content about Experiment.AutoFixture in readme,

because its nuget-package will no longer be published as transform
source files.
refactor: Makes Experiment.AutoFixture published as library form, not

transform source files.
refactor: removes the unnecessary class 'Person' in the scenario.
refactor: renames AutoFixture to TestFixture.
refactor: clarifies the exception message.
build: adds copyright to nuspec files.
docs: adds release note for publishing Experiment.AutoFixture as dll.
build: increment patch version,

to indicat that publishing Experiment.AutoFixture as dll form is a
fix.