relax SVN archive

Fix for bug #21309, the 'R2eff' dispersion model failure when peak intensity data is missing.

The bug is reported at https://gna.org/bugs/?21309.

The problem was that the check for missing data in the _calculate_r2eff() private API method was
accidentally deleted in r21505 in the relax_disp branch. See the commit at
http://article.gmane.org/gmane.science.nmr.relax.scm/19261 and the accidental deletion at
http://svn.gna.org/viewcvs/relax/branches/relax_disp/specific_analyses/relax_disp/api.py?view=diff&r1=21504&r2=21505&pathrev=21505.

Created the Relax_disp.test_hansen_cpmg_data_missing_auto_analysis system test.

This is used to demonstrate a failure in the 'R2eff' model when some data is missing.

Created a base data pipe for Flemming Hansen's truncated CPMG data for testing out missing data.

The :4 spin is missing just a few data points, whereas the :71 spin is missing all 800 MHz data.

Synchronised the test_suite/shared_data/dispersion/Hansen/relax_disp.py with the sample script.

This script now matches very closely with the sample_scripts/relax_disp/cpmg_analysis.py sample
script. This is for sample script debugging purposes.

The os.sep variable is now used by the cpmg_analysis.py dispersion sample script.

Docstring improvement for the test_suite/shared_data/dispersion/r1rho_off_res_tp02/R1rho_analysis.py script.

Added the DATA_PATH variable to the cpmg_analysis.py dispersion sample script.

This allows the user to more easily specify a different directory for the files.

All of the relaxation dispersion auto-analysis options are now exposed by the sample scripts.

This included the pre_run_dir argument for specifying a directory of results from a non-clustered
analysis and the flag for running MC simulations for all models.

Fix for a number of PNG files for NESSY and Bruker icons for broken IDAT entries.

This problem was identified by Justin Lecher <jlec att gentoo doot org> in the post
http://article.gmane.org/gmane.science.nmr.relax.devel/4750 (Message-ID:
<5298572C.5010409@...>), or in the threaded view
http://thread.gmane.org/gmane.science.nmr.relax.announce/46/focus=4750.

As a result those icons are missing in the GUI. This was fixed using the pngcrush tool.

Bug fixes for the non-functional R1rho_analysis.py relaxation dispersion sample script.

This script was horribly broken, but it should now work. It can even be executed from the base
relax directory or from within the sample_scripts/relax_disp/ directory and perform the full
analysis (assuming write access to the relax source directory).