Moved leela to use leela_client structure.
Removed some useless `return` commands.
Added version to require list.
Added modules around the files to avoid poluting the global namespace.
Fixed some modules.
Fixed paths.
Merge branch 'ruby_client' of code.locaweb.com.br:iaas/leela-client
testing the distribution of the md5ring function [0.1 max fault tolerance]