PartJobShop: display in GUI a spreadsheet to define parts of an order
PartJobShop: work in progress on Part Job Shop, with associated json
PartJobShop: very simple order in GUI have now successfull simulation run

All the display of results needs to be reviewed
PartJobShop: find job informations in initial schedule
ParJobShop: display only needed steps on spreadsheet result
PartJobShop: improve some comments
PartJobShop: write function to calculate routes
ParJobShop: fixed issues to have two orders working in the GUI
replace JobShop with PartJobShop, do not maintain JobShop any more
PartJobShop: update the example