relax SVN archive

Fixed a call to write_spin_data() which should pass in sys.stdout as the file.

Partial bug fix for bug #14464 (https://gna.org/bugs/?14464).

Fix for the PDF manual compilation - os.rename() is being used instead of shutil.move(). No idea
why shutil.move() was no longer working?!?

Modified the output of the user function docstring parsing.

Partial bug fix for bug #14464 (http://gna.org/bugs/?14464).

The problem fix here (only one of a few) was the new design of the user function classes. This was
breaking the docstring fetching script used to generate the relax manual.

Converted the read_spin_data() file arg back to a keyword.

The file_data arg can be used instead!

Converted value.write() to user relax_io.write_spin_data().

Fix for the test_write_protein_sequence() unit test.

The output file format is now a little different.

Fixed the write_spin_data() from read().

The file arg must be given, and now as this is set to sys.stdout, STDOUT redirection works again.

Converted the file keyword args to read_ and write_spin_data() to normal args.

Missing import.