using flag structure for argurments to collision requests

include/hpp/fcl/collision_data.h

test/benchmark.cpp

test/test_fcl_collision.cpp

test/test_fcl_distance.cpp

test/test_fcl_distance_lower_bound.cpp

test/test_fcl_frontlist.cpp

test/test_fcl_octree.cpp

test/test_fcl_profiling.cpp

test/test_fcl_utility.h