Obstacle Control removed from MusolesiMobility; changed to work without LineSegmentsMobilityBase changes

- obstacles support removed (it was very rudimentary in the first place)
- setInitialPosition() split into two functions
- girvanNewman removed (did not work)
MusolesiMobility: code formatting and comments
MusolesiMobility: further cleanup

- contraint area: INET now uses min,max instead of pos+size
- Removed some useless functions and variables,
- memory allocation by malloc is replaced with operator new[]
Memory allocation and deallocation fixed, more useless code removed.