Allow script_args to be passed to deploy.sh
require boto for issue #303
Merge pull request #305 from techhat/scriptargs

Allow script_args to be passed to deploy.sh
Better checking for key dirs
Resolve error with missing script_args
Merge pull request #308 from techhat/scriptargs

Resolve error with missing script_args
Merge pull request #307 from techhat/issue298

Better checking for key dirs
Sudo is being prepended later if needed.

If sudo is needed, it can be set in the cloud profile.  If it is
set there, then we end up with 'sudo sudo /tmp/deploy.sh', which
just looks ugly.
Merge pull request #313 from jesusaurus/sudosudo

Sudo is being prepended later if needed.
Switching sftp from paramiko to sshpass+scp
Technically using scp, change things accordingly
Change root_cmd() to use ssh entirely, instead of paramiko
Remove unused sftp transport
Switch ssh.exec_command to root_cmd (except for ibmsce)
Switch ssh.exec_command to root_cmd for ibmsce
Remove unnecessary ssh definition for paramiko
sshpass is now required
Remove the last bit of paramiko from the code
Remove paramiko as a requirement
Merge pull request #316 from techhat/sshpass

Replace Paramiko with sshpass