Code to save PRM graph during pilot run, and load it during navigation sessions (tested on a real robot)

[bimalka98]

• Source code
• Tested with an actual robot: See the demo

1. Function for saving the PRM graph after the pilot run: void savePRMGraph()
2. Function for loading it in subsequent autonomous navigation sessions: void loadPRMGraph()
3. These functions are called during the destructor and the constructor of the class TraversabilityPRM{}.