[pymapistore]: Add sanity checks when listing capabilities and remove a segfaulting `talloc_free`
[mapistore-python][rest.py]: Use MAPIStore table types and errors instead of magic values
[mapistore-python][rest.py]: Remove unnecessary temporal dictionaries
[mapistore-python][REST]: Implement create_attachment + attachment class
[mapistore-python][REST]: Implement attachment save