cubicweb-elections #2422153 Import - First implementation of import [open]

Create an import command. The data can be found here http://www.data.gouv.fr/content/search?SearchText=%C3%A9lections

This import command relies on soon to be released SQLGenStore.

prioritynormal
typebug
done in0.1.0
load1.000
load left0.000
closed by<not specified>