Give the FakeNancyBootstrapper some love

[thecodejunkie]

Bring it up to par with the actual bootstrapper and make it possible to declare things like conventions, startups, modules and so on

[thecodejunkie]

The following breaking changes will be introduced by this change

• FakeNancyBootstrapper is renamed to ConfigurableBootstrapper
• The implementation is moved from Nancy.Testing.Fakes to Nancy.Testing
• Some of the method in the configuration API have had their names changes (like Engine -> NancyEngine) to follow the same naming convention

In addition a test was added to ensure that all (with exception of an ignore list) properties on NancyBootstrapperBase<> and NancyInternalConfiguration have equivalent configuration methods on the configuration API of the ConfigurableBootstrapping. This should help us make sure that the test fails if we add new members to the bootstrapper and don't make sure that the ConfigurableBootstrapper is kept in sync