debinstall #9929 improve dialog messages [resolved]

replace messages that look like debug messages with concise messages informing the user of the progress and the actions being taken.

::
[INFO ] debinstall.publish: Published in 'dists' section of the 'squeeze' distribution. [INFO ] debinstall.publish: Publishing of '/home/logilab/repositories/logilab-public/incoming/squeeze/cubicweb-fresh_0.2.0-1_i386.changes'...

becomes:

logilab-public/squeeze: published cubicweb-fresh 0.2.0-1

and messages about the generation of the index files get shortened to:

logilab-public/sid: index file generated.
prioritynormal
typeenhancement
done in2.3.0
load0.300
load left0.000
closed by#add96d4e78af Closes #9929: improve dialog messages, #f15b3dc749c9 Closes #9929: improve dialog messages