mermaid2hierarchy

Added a mermaid2hierarchy converter
which is demostrated in the mermaid.ipynb in the demo folder
module enbios/generic/mermaid2hierarchy.py
contains the methods: convert_mermaid_file and convert_mermaid_lines (which takes a string with lines or an array of strings, representing lines

Reset enbios locations of BW activities
BW Adapter regionalization now has the field clear_all_other_node_regions which sets all locations of activities to None, that are not set in the hierarchy or set_regions field