apycot #2060051 Get the pylint metrics into cubicweb [open]

The following metrics would be useful/interresting :

• code metrics (lines of code/comment/etc with percentages)
• Statistics by type (number of modules/clases/methods/functions)
• Duplication (nb of duplicated lines)
• pylint code distribution (so we can do a piechart of which kinds of errors/warnings we get)