Lay the burden to provide the library name and directory on the user.
A.K.A.: Improve portability.

Implement a meta path loader instead

Add the loaded namespaces tracking

Fix a bug where clr wasn't in sys.modules after reload

Further refinements to setattr logic on ModuleObjects

It was modernized in the upstream

…-hook

Modernize the import hook

from PropertyObject

This commit adds a "last line of defense, best effort serialization"
to serialize types not marked as Serializable. Such objects are
deserialized as derived classes with all methods and properties
overriden to throw a "Not Serialized" Exception.
Fields are not initialized and may be null.

Sealed classes and implemented interface methods are still a problem to
be solved.

plus guard rails for private classes

and review fixes

don't try to derive from sealed types

Allows the project to be referenced in other .NET projects without
adjusting its project file (#1853).

There are small typos in:
- pythonnet/__init__.py
- tests/test_import.py

Fixes:
- Should read `splitted` rather than `splited`.
- Should read `loaded` rather than `laoded`.

Signed-off-by: Tim Gates <tim.gates@iress.com>

…ialization

latest clr_loader version breaks the python tests otherwise

Last line of defense, best effort serialization

Also updates the base version of pythonnet.