Add README.md
Add packages to plan/main
Add conf.d/outscale

Appliance setup script
Add buildbot slave files for v0.8.6p1
Configure buildslave

 * Change buildslave directory.
 * Grab master hostname, slave username and slave password from
   user-data. This is unfortunately transmitted in cleartext.
Add config for buildslave init script
Change buildslave description
Fix tkldev-setup inithook
Start buildslave after inithooks

Avoid race where the slave starts building before tkldev-setup and
fails