relax SVN archive

The loading of RDCs and PCSs for non-existent spins now only throws a RelaxWarning.

Rather than throwing a RelaxError, this allows for partial loading of alignment data for certain
regions of the molecule.

When loading save states, data pipe names are always converted to a string to avoid unicode problems.

The select.read() and deselect.read() user functions can now accept file handles or dummy file objects.

Bugfix for status = None in medel selection.

Directory variable for multi_model() is fixed.

Proton name for value.set() function is set as '1H'.

relaxGUI converts name of hetero nucleus from relaxGUI settings to hetero nucleus known by relax ('13C', '15N').

Function to exclude unresolved spins uses direct relax API commands, as the GUI uses a relax dummy file.

Name of status objects are corrected and synchronized with status.py and controller.py.

Check of variable 'unres' is switched off temorary, as the GUI hands over a relax dummy file to relax.