pithos-backend: Move code under synnefo.pithos.*
pithos-backend: Update references
pithos-backend: Update external references
stats: Move code under synnefo.stats.*
stats: Update references
stats: Update external references
tools: Move code under synnefo.tools.*
tools: Update references
tools: Update external references
snf_django: Move code under synnefo.django.*
snf_django: Update references
snf_django: Update external references
snf-deploy: Move code under synnefo.deploy.*
snf-deploy: Update references
snf-deploy: Update external references
Replace versions dir with local version.py files
cyclades: Move urls.py to synnefo.cyclades

With the explicit cyclades prefixing there is now no fear for the file to
interfere with another package's urls file.