relax SVN archive

Fixes for the printout from the pipe_control.pcs.return_pcs_data() function.

The number of PCSs printed out was including values of None when data was missing for one alignment.
These values of None are no longer counted.

Updated the N-state model num_data_points() function to use more modern integer incrementation.

Big bug fix for the N-state model num_data_points() function.

This is from the specific_analyses.n_state_model.data module. This code was very much out of date.
It was expecting an ancient behaviour where the spin container 'pcs' variable and interatomic data
container 'rdc' where lists of floats. However these were converted many years ago to dictionaries
with keys set to the alignment IDs. The result was that no RDCs nor PCSs were counted as a base
data point, so the function would in most cases return a value of zero.

Expanded the printouts from the statistics.model user function to include the statistics.

Fix for the N_state_model.test_statistics system test - the probabilities were missing from k.

The N-state model now uses the _get_model_container_cdp() method.

This is aliased as the get_model_container() specific analysis API method.

Implemented the specific analysis API _get_model_container_cdp() commmon method.

This is to be used for the get_model_container() for returning the current data pipe object as the
model container. This is for the global models where the model information is stored in the pipe
object rather than in spin containers.

Defined the get_model_container() specific analysis API method.

This base method raises a RelaxImplementError, therefore each analysis type must implement its own
method (or use an API common method).

Fix for the specific analysis API _print_model_title_global() common method.

This method was horribly broken, as it was never used. The new statistics.model user function
together with the N-state model uncovers this breakage.

Fix for the statistics.model user function backend.

The API methods are now called with the model_info argument set to a keyword argument so that it is
always passed in as the correct argument.