Allow to lint/edit/develop more easily the bash script without having tons of template parameters.

slaprunner: concatenate exporter.exclude file of each partition of the runner and write it in the standard location.

Allow to exclude things from inside of the runner's partitions without knowing what instance it is.

This permits invoke custom code after copy the instance to the right location [Working in progress for better restauration]

  By using more them one, it fails during the compilation.

  Missing update on parts, slapos-repo needs to be explicitly invoked.

It was applied by the combination of [slapos-repo] that checkouts master
branch and [slapos-repo-config] that checkouts
$${slap-parameter:slapos-software} branch afterwards.
When instance profile runs for the second time, [slapos-repo] resets to
master and [slapos-repo-config] does nothing.
This fix consists in using directly $${slap-parameter:slapos-software}
in [slapos-repo].

[slapos-repo-config] was also setting up .project, this is still the
case and the section was renamed to [instance-software] for
consistency.

and drop using minitage.recipe.egg that has too many side-effects.

enable libstemmer in groonga.