relax SVN archive

Used some colour for the relax GUI terminating print out asking for citations.

Python 3 updates for the entire relax code base.

The command used was:
2to3 -w \
-f buffer \
-f idioms \
-f set_literal \
-f ws_comma \
-x except \
-x import \
-x imports \
-x long \
-x numliterals \
-x xrange \
relax .

The completion of the test suite in the GUI mode now sets the controller main gauge to 100%.

Added checks to the BMRB export to make sure all necessary data has been input.

If not, then the Missing_data dialog will be presented to the user to explain what is required.

Removed the word 'used' from the software and scripts GUI list element titles.

The Missing_data dialog can now have the parent wx element specified.

This is needed when launched from a child window such as the BMRB export window.

Initialized merge tracking via "svnmerge" with revisions "1-16831" from
svn+ssh://bugman@.../svn/relax/trunk

Removed merge tracking for "svnmerge" for
svn+ssh://bugman@.../svn/relax/1.3

Initialized merge tracking via "svnmerge" with revisions "1-16829" from
svn+ssh://bugman@.../svn/relax/trunk

Removed merge tracking for "svnmerge" for
svn+ssh://bugman@.../svn/relax/1.3