Update README.md links and `resque-scheduler` version
Update README.md links and `resque-scheduler` version

lantins/resque-retry,lantins/resque-retry,jzaleski/resque-retry,thenovices/resque-retry,thenovices/resque-retry,thenovices/resque-retry,jzaleski/resque-retry,jzaleski/resque-retry,lantins/resque-retry