relax SVN archive

Bug fix for the quaternion_to_R() function.

Wrote 2 new functions, R_random_hypersphere() and quaternion_to_R().

Renamed random_R() to R_random_axis().

Changed the precision of the te check in the model-free system tests.

This is in response to Sebastian's post at
https://mail.gna.org/public/relax-devel/2009-05/msg00003.html.

Added the functions random_rot_axis() and random_R() to generate random rotations.

Created the R_axis_angle() function to generate the rotation matrix from the axis-angle notation.

Converted all parts of the hybrid module to the 1.3 line design.

This includes the addition of many new, very simple methods and the translation of old code.

Removed a test that disallowed model selection between different pipe types.

Converted the duplicate_data() method to the 1.3 line design.

Added a check for the pipe type to hybridise().