[FIX] stock_picking_wave: Missing _description
[FIX] Packaging: Debian: ignore root Makefile

Commit 388732dfa6a1 introduced a makefile at the root of the project, and
dh_auto_build is using this file instead of setup.py. Explicitely tell
debhelper to not use the makefile.
[FIX] point_of_sale: when loading models with a specified id, use read instead of search_read, to prevent inactive records from being skipped
[FIX] /web/binary/{image,saveas}: use request.registry instead of deprecated `request.session.model`

This makes the controllers work also for
public users, e.g. in the frontend.
[FIX] website_forum: avoid access error when closing spam/abuse questions

Logging the user login is not necessary, but
accessing it might cause access errors. Logging
the UID is equivalent anyway, so let's not bother.