relax SVN archive

Extended the systemtest for the protocol for repeated dispersion analysis.

Task #7826 (https://gna.org/task/index.php?7826): Write an python class for the repeated analysis of dispersion data.

Further extended the protocol for repeated dispersion analysis.

Task #7826 (https://gna.org/task/index.php?7826): Write an python class for the repeated analysis of dispersion data.

Fix for the dependency check for showApod in systemtests.

Fix for raising error when calling showApod, and subprocess module not available.

Fix for comments to dependency check of showApod.

Modified systemtest Relax_disp.test_show_apod_extract that test output from showApod. The output can be different according to NMRPipe version. The 'Noise Std Dev' is though the same.

More expansion of the release checklist document.

Added text about creating internal and external links for the wiki release notes.

Modified the announcement section of the release checklist document.

Text about removing wiki markup has been added.

Small changes for the Gna! news item in the release checklist document.

Updated the 'Announcement' section of the release checklist document.

This now includes details about initially composing the message using the relax wiki
(http://wiki.nmr-relax.com), and then how that text and the CHANGES file are used for the email
announcement (http://news.gmane.org/gmane.science.nmr.relax.announce) and the Gna! news item
(https://gna.org/news/?group=relax).