trajectories → math Relation

File in drake/common/trajectories	Includes file in drake/math
bspline_trajectory.h	bspline_basis.h
piecewise_constant_curvature_trajectory.h	rigid_transform.h
piecewise_constant_curvature_trajectory.h	wrap_to.h
piecewise_pose.h	rigid_transform.h
piecewise_quaternion.h	rotation_matrix.h