version up : curl 7.29.0.
use slapos.recipe.build:gitclone instead of ad-hoc usage of plone.recipe.command.
also pin 'cloudooo = 1.2.5-dev' to avoid possible usage of old released 1.2.3 egg.
Bump ca-certificates version.
Do not duplicate find-links already present in stack/slapos.cfg .
Any slapos SR may need to use xz-friendly h.r.download .
Fix typo in buildout section name.
Merge remote-tracking branch 'origin/erp5-component' into erp5