Major refactoring to provide support for saving/restoring configs in TaurusPlot and TaurusTrend.
Also some other issues solved in the same refactoring.
add save/restore config support in TaurusTrend and TaurusPlot
add slice support in trends and plots
unify model chooser for TaurusTrend and TaurusPlot
add unit tests for TaurusTrend, TaurusPlot, y2ViewBox, configproperties,...
improve legend appearance
fix some config dialog issues
allow background color change in plot config dialog
fix object duplicated registrations (potential mem leaks)
Major refactoring to provide support for saving/restoring configs in TaurusPlot and TaurusTrend. Also some other issues solved in the same refactoring.
Fixes #53 Fixes #52 Fixes #15 Fixes #14