relax SVN archive

Created the model-free PyMOL macro functions by copying the Molmol ones.

This will need to be modified as Molmol commands are still being issued.

Fix for the results viewer window in testing mode - it is now not shown.

Added a line for memory allocation of the "curve_type" array.

A further step at getting the chosen equation passed from Python to C.

Not clear if it works.
Need for fixing the dependency check, as relax thinks the C module is
not compiled, although compilation seems to happen without error...

Fix for the pipe editor window - it is now updated when initially created to show all loaded pipes.

Fixes for all the calls to the GUI interpreter instance.

This is now a special thread object, and user function calls are now queued.

The auto-analysis GUI pages are now waiting for the data pipe to be created.

This fixes race conditions.

The GUI interpreter thread is now flushed prior to execution of the auto-analyses.

Created the GUI interpreter thread flush() method for blocking until the queue is empty.

Maybe found a way to switch from one equation to the other.

This approach, not general, uses the number of parameters as a
test to the use of either the 2-parameter equation 'exp_2param_neg' or
the 3-parameter equation 'exp_3param_inv_neg'...

It is not clear if it works, but, at least, the code compiles...