The class being wrapped.
Mixture of definitions of members of T to be wrapped and
optional arguments.
Concerning optional arguments, accepts
PyName!(pyname)
The name of the class as it will appear in Python. Defaults to
T's name in D
ModuleName!(modulename):
The name of the python module in which the wrapped class
resides. Defaults to "".
Docstring!(docstring):
The class's docstring. Defaults to "".
Wrap a class.