relax SVN archive

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().

Added the hybrid data pipe to the list of allowable data pipes.

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

Created the compare_sequence() for checking if 2 sequences are the same.

Renamed the hybridise() pipes keyword to pipe_list.