Use the static method from FieldSplitStatic in FieldEditor wrapper class
Some work on __init__s
If size if fixed, min and max should be equals.
remove useless import
If specified domain is a list with a single element, it doesn't create an Alt and instead a leaf element
Improve tests in FormatEditor and introduce field reset method
First functionnal version of the FieldSplitStatic and introduce FieldReseter.
add new doc tests
First version of the clusterByKey