Change the way you use `rsync`

- Create global variable SSH_OPTIONS to centralize SSH options;
- Fixed remote permission problem when removind remote hooks;
- Passed log responsibility the `_deploy_prepare` function intead
  `_deploy_prepare_*`;
- Update `_ssh` function to use SSH_OPTIONS variables;
- Remove logging responsibility of `_deploy_prepare_rollback` function;
- Change the upgrade to use the `rsync` localy insteade to use SSH
  connections for the deploy script.