relax SVN archive

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.

Added the pipe keyword to all the sequence counting functions.

Added 3 new RelaxErrors for sequence matching.

Updated the pipes.hybridise() user function interface to the 1.3 line design.