Merge pull request #3 from craiganderson/stable/havana

Stable/havana
Update disk.rb
Merge pull request #4 from craiganderson/stable/havana

Stable/havana
add support of swauth
add support of swauth
add support of swauth
modify generate swift rings
undo latest commit
Merge pull request #7 from vnaboychenko/stable/havana

Stable/havana
add identity registration capabilities for swift