Support for orientation data

boat3d	Draw boat glyphs for orientation data
eulerzxz	Create an orientation using Euler angles
eulerzxz-class	Orientation classes
eulerzyx	Create an orientation using Euler angles
eulerzyx-class	Orientation classes
matrix-classes	Matrix orientation classes
mean,ANY-method	Methods for calculating the mean
mean,orientation-method	Methods for calculating the mean
mean-methods	Methods for calculating the mean
nearest.orthog	Find nearest SO(3) or orthogonal matrix.
nearest.SO3	Find nearest SO(3) or orthogonal matrix.
orientation	Class "orientation"
orientation-class	Class "orientation"
orientlib	Orientation Library
orientlm	Linear models for orientation data
quaternion	Create an orientation using quaternions
quaternion-class	Orientation classes
rotation.angle	Rotation angle or distance
rotation.distance	Rotation angle or distance
rotmatrix	Create an orientation using Euler angles
rotmatrix-class	Matrix orientation classes
rotvector	Create an orientation using vectorized 3x3 matrices
rotvector-class	Orientation classes
skewmatrix	Create an orientation using the entries in a skew-symmetric matrix representation
skewmatrix-class	Matrix orientation classes
skewvector	Create an orientation using the entries in a skew-symmetric matrix representation
skewvector-class	Orientation classes
vector-classes	Orientation classes
weighted.mean,ANY,ANY,ANY-method	Weighted mean function
weighted.mean,orientation,numeric,missing-method	Weighted mean function
weighted.mean-methods	Weighted mean function