#32 - the temp path for the auto script now uses the ssh username as a p...

...refix. also allows the users to override, DRY up the code
I wonder if it is the only option to change the user - there are things like [`as` in sshkit](https://github.com/capistrano/sshkit/blob/master/lib/sshkit/backends/abstract.rb#L91) or [configuring `Host` in sshkit](https://github.com/capistrano/sshkit/blob/master/lib/sshkit/host.rb#L141) could influence it