move EnsureJujucSymlinks inside jujuc; move jujuc and debug inside context
Merge branch 'master' of https://github.com/juju/juju into uniter-consolidate-context
Merge pull request #1023 from fwereade/uniter-consolidate-context

move EnsureJujucSymlinks inside jujuc; move jujuc and debug inside context

Just code moves, should be trivial.