Remove deprecated code

- Remove some deprecated code marked as "will be deleted in 0.5"
- Change some others to "deprecated since 0.4", so we'll delete it in 0.6
Removing deprecated code: incorporate comments
Fix jclouds getPublicHostnameAws

- Pass sshConfig in correctly; single key of "config" with map
  seems to be no longer supported.
Merge pull request #587 from aledsage/fix/Jclouds-ssh-keys

Fix jclouds getPublicHostnameAws
Merge pull request #573 from aledsage/fix/delete-deprecated

Remove deprecated code