relax SVN archive

Splitting deploy script into several small functions.

Small changes to deploy script.

Putting installation into functions in deploy script.

Expanding script for installation.

Adding a testing deploy script, for rapid deployment on Google Cloud Computing.

This is for intented install in Ubuntu 14.04 LTS

Removing lines with spaces in it.

Fix for running relax at a server with no graphical display and using matplotlib.

The error was found by:
relax_trunk --time -s Relax_disp.test_repeat_cpmg -d

And the error generated was:
QXcbConnection: Could not connect to display
Aborted (core dumped)

The backend of matplotlib have to be changed.
This is for example described in:
http://stackoverflow.com/questions/2766149/possible-to-use-pyplot-without-display
http://stackoverflow.com/questions/8257385/automatic-detection-of-display-availability-with-matplotlib

The solution is:

import matplotlib
if not "DISPLAY" in environ:
# Force matplotlib to not use any Xwindows backend.
matplotlib.use('Agg')

Fixes and improvements for the graphs produced by the structure.pca user function.

The different sets are now correctly created, and are now labelled in the plots.

Improved the printouts from the relax library principle component analysis.

This is in the pca_analysis() function of the lib.structure.pca module.

Created the Structure.test_pca_observers system test.

This is for testing the new observer structures concept of the structure.pca user function.