Basic Squadrats integration

[Ebe66]

Adds your Squadrats progress to the generated maps. Until I see some activity on the outstanding PR's here I won't be adding any documentation to this as it seems the project is unfortunately pretty much dead atm. Minimal instructions:

• You need to have gpsbabel installed (see the Wandrer PR)
• From the Squadrats website map view download the kml file and put it in the downloaded maps folder
• Start whooMapsCreator via the gui and select the integrate squadrats option from the advanced tab, or use the -ds cli parameter .

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