cubicweb-brainomics #2955632 clarify label vs. type [open]

Clarify the use of label and type attributes - see attached screenshot.
Fix Localizer/Imagen importers to consitently populate the database.

prioritynormal
typebug
done in<not specified>
load1.000
load left1.000
closed by<not specified>
attachment

label-type.png

Ticket #2955632 - latest update on 2013/11/26, created on 2013/06/20 by Dimitri Papadopoulos