Drop system package checking

It will not be necessary using a chroot.
Remove plugins package
Remove system checks leftovers
More plugins leftovers
Plugins leftovers
Drop more distro checking code
Fix lint
Fix loading modules
Remove unused argument
On build_only don't clean state dirs
Drop support for full builds

We should just use clean in buildbot.
Fully remove clean all
Don't fail when trying to clean a module not cloned
Add dependency on pygments

It is really docker which depends on pygments but that's
not python so we can't pull the module in.
Don't print ccache stats

This was supposed to be something temporary to prove
ccache was working fine.
Add a couple of karma options for easier debugging
Use a variable rather than command line for home
Use the splitted out sourcestamp module
Fix the profile pref
Drop the profile pref

We can just use SUGAR_PROFILE