relax SVN archive

The data structures of the AlignTensorList class are now packed into the XML file.

Expansion of the test_to_and_from_xml() system test to check more data structures.

Fix for the data_names() method for when no model has been setup.

This allows the frame order data pipe to be written out prior to the model setup.

Reactivated the system tests turned off in r9533.

Bug fix for the test suite.

The temporary files were not always deleted if a .bz2 extension was added! Now relax_io.delete() is
being called to fix this.

Bug fix for the delete function.

The function was failing if the file was missing!

Created a module for alignment tensor related system tests.

Only the single test test_to_and_from_xml() has been created so far. This checks the dumping and
reloading of alignment tensors into an XML file.

Final 1.3 line redesigns of the relax_io module.

The log() and tee() functions have been renamed to io_streams_log() and io_streams_tee(), and the
old IO.logging_off() class method has been converted to the io_streams_restore() function. The
io_streams_restore() function is also differently designed, using the true original IO streams
(sys.__stdin__, sys.__stdout__, and sys.__stderr__).

The IO.delete() method has been converted to a module function.

The IO class has been eliminated.

Created axis_angle_to_euler_zyz().

The test_euler_zyz_to_euler_zyz() unit test now checks both euler_zyz_to_axis_angle() and
axis_angle_to_euler_zyz().

Created the euler_zyz_to_axis_angle() conversion function.