polipo: don't use default config file (set to /dev/null)
shell: try to clean all contexts without blocking shell
raised the exceptions in debug mode
Kameleon depend on childprocess ~> 0.3
Added the arch in the template name
Added some debian-based templates for virtualbox
No more internal cache for debootstrap
Fixed duplicated ubuntu repository (restricted)
Detached the dvddrive (iso) before virtualbox export