Now statecharts render properly on Windows with a 4K screen
Increased version number

Added  support for the state return node, and removed overlapping of
edges

...to support properly state aggregation and composition.
Clustering of graphs has to be handled manually because of graphviz
limitations.

in Helper.py, the propagate_inputs function was not adequate in the case
of state aggregations

State aggregation

State aggregation

State aggregation

Moved to 1.3.0 - this version introduces support to state aggregations.