Docco for osd-visualization
Docco for osd-visualization

- minor improvements to sort by hosts - use a look up table
- minor improvement to calcPosition, memoize results

ceph/romana,ceph/calamari-clients,ceph/calamari-clients,SUSE/romana,GregMeno/test,GregMeno/test,SUSE/romana,SUSE/romana,GregMeno/test,ceph/romana,ceph/calamari-clients,SUSE/calamari-clients,ceph/calamari-clients,SUSE/romana,SUSE/calamari-clients,ceph/romana,ceph/romana,ceph/calamari-clients,SUSE/romana,SUSE/calamari-clients,SUSE/calamari-clients,SUSE/calamari-clients,GregMeno/test,ceph/romana,GregMeno/test