Moved fake manager creation and initial configuration into the proxy generator (Part I)

This is the first part of PR #372 (we split it up into 2 PRs as mentioned there).

It solves #371 partially, namely that the default behavior is available inside the c'tor call. Therefore it also solves the bug #368 (see the `when_faking_a_class_which_calls_virtual_property_members_in_constructor` test case).
If we're using a new `SerializableFakeCallProcessorProvider`, which does not mirror how `CastleDymamicProxyGenerator` works, I'm not sure this test continues to provide the value that it says it does in its name…