Incrementing minor version to v0.1.0

Indicates that this is the first release.
File movement - EmptySpecimenCommand

Its namspace and source file are moved.
Addressing CA1020(AvoidNamespacesWithFewTypes)

The Ploeh.AutoFixture namespace is derived from autofixture.
Incrementing patch version to v0.1.1

Indicates that the previous namespace changes are actually not the
backward compatible change but as it is trivial, it is proper way to
treat a bug fix.