[IMP] release: add structured version_info tuple, properly comparable
[IMP] release: add structured version_info tuple, properly comparable

The semantics were inspired by Python's own sys.version_info
ovnicraft/openerp-server,vnc-biz/openerp-server,splbio/openobject-server,MarkusTeufelberger/openobject-server,gisce/openobject-server,MarkusTeufelberger/openobject-server,splbio/openobject-server,gisce/openobject-server,vnc-biz/openerp-server,gisce/openobject-server,MarkusTeufelberger/openobject-server,ovnicraft/openerp-server,splbio/openobject-server