[discretizations] add sanity check to wrapper
[operators.base] add pb_container() to allow bindings of container()
[la.container] whitespace
[la.container] move wrongly placed return
[la.container] fix wrong custom_name
[la.container] add bindings for valid() to matrices
[la.container] add valid() to wrapped vectors
[la.container] add bindings of mv() to matrices
[operators] add optional bindings of container() to operators
[core.bindings] use container_based=True for operators
[core.bindings] enable bindings of mv()