adding a plugin for visualising self tests
extracting nodes which have a self_test service available
calling self test service for selected node
displaying the data for each tests - need tweaking
added possibility to run all available self tests - also folds down the previously run tests
using colors to make it clearer + added shortcuts
displaying the pictures in /tmp/self_tests (organised by folders)
more meaningful label when no plot to display
better display of images
running tests services in separate threads - need to add progress
added progress bar, wait cursor, etc.. to show progress of self tests
added documentation
added save test results
Merge pull request #2 from shadow-robot/F_self_test

GUI plugin for self tests