relax SVN archive

Shifted the test_write_read_pipes() system test to the 'state' test module.

The program state is now being saved as the results file is for just one data pipe.

Updated the specific_fns module __all__ list for the SRLS module.

Added a very basic, and completely empty module and class for SRLS analysis.

This is to allow the data pipe to be created.

Removed an empty line.

Deleted the __init__() class methods as these were empty, and shifted the docstring to that of the class.

The test_write_read_pipes() system test is now using the VALID_TYPES module variable to get all pipes.

Shifted the valid types private function variable into a module variable.

Wrote a system test for the writing and re-reading of data pipes.

Renamed the data pipes system tests module.

Added a unit test to check if all the maths_fns.kronecker_product.transpose_*() functions revert.

Calling the function twice should return the matrix to the original state.