Connection with experimental parameters

[berceanu]

So this is loosely connected to the standard, but just an idea at this point. Do you think there should be a part of the standard that deals with the connection between code parameters and real parameters measure in experiments? For example, how is the measured laser duration and laser beam size connected to the parameters of the picmistandard.PICMI_GaussianLaser or picmistandard.PICMI_AnalyticLaser classes, etc.