Create an abstract DataHolder class to serve as parent class for Plasma0D, Plasma1D, Plasma2D, Plasma2DRipple, and Plasma3D, as well as DataCam1D and DataCam2D and DataCamSpectral1D and 2D.

Make it child class of TofuObject to inherit copy(), save(), get_nbytes()...

Create a Plasma0D class to handle time traces collections and time-dependent plasma characteristics (separatrix, axis...)

Implement built-in interactive plots
Implement methods for exporting to pandas DataFrame
Implement method for computing plateaux (Jorge)