Adding powercrust lib. The sources were modified and updated for c++/CMake usage.

CMakeLists.txt

GraspPlanning/CMakeLists.txt

GraspPlanning/ExternalDependencies/powercrust/CMakeLists.txt

...Planning/ExternalDependencies/powercrust/CustomLogger.cpp

GraspPlanning/ExternalDependencies/powercrust/CustomLogger.h

GraspPlanning/ExternalDependencies/powercrust/crust.cpp

GraspPlanning/ExternalDependencies/powercrust/getopt.cpp

GraspPlanning/ExternalDependencies/powercrust/getopt.h

GraspPlanning/ExternalDependencies/powercrust/heap.cpp

GraspPlanning/ExternalDependencies/powercrust/hull.cpp

GraspPlanning/ExternalDependencies/powercrust/hull.h

GraspPlanning/ExternalDependencies/powercrust/io.cpp

GraspPlanning/ExternalDependencies/powercrust/label.cpp

GraspPlanning/ExternalDependencies/powercrust/math.cpp

GraspPlanning/ExternalDependencies/powercrust/pointops.cpp

GraspPlanning/ExternalDependencies/powercrust/points.h

GraspPlanning/ExternalDependencies/powercrust/pointsites.h

GraspPlanning/ExternalDependencies/powercrust/power.cpp

GraspPlanning/ExternalDependencies/powercrust/powercrust.cpp

GraspPlanning/ExternalDependencies/powercrust/powercrust.h