Add a shell helper for demos/presentations
Add a shell helper for demos/presentations

This will keep your bash/zsh prompt at the top of the screen.
It's useful for presentations and demonstrations.

Other features:
* clears the screen automatically with each command run
* lists directory contents when entering them (abbreviated if needed)
* shows the git or svn status in directories that have them

Run the commands autotop and unautotop to enable or disable.

joshsamuelson/puppetlabs-training-bootstrap,samuelson/puppetlabs-training-bootstrap,kjhenner/puppetlabs-training-bootstrap,carthik/puppetlabs-training-bootstrap,marrero984/education-builds,kjhenner/puppetlabs-training-bootstrap,carthik/puppetlabs-training-bootstrap,johnduarte/puppetlabs-training-bootstrap,marrero984/education-builds,puppetlabs/puppetlabs-training-bootstrap,puppetlabs/puppetlabs-training-bootstrap,wbhamilton/puppetlabs-training-bootstrap,carthik/puppetlabs-training-bootstrap,klynton/puppetlabs-training-bootstrap,samuelson/education-builds,samuelson/puppetlabs-training-bootstrap,johnduarte/puppetlabs-training-bootstrap,samuelson/education-builds,joshsamuelson/puppetlabs-training-bootstrap,samuelson/education-builds,puppetlabs/puppetlabs-training-bootstrap,klynton/puppetlabs-training-bootstrap,wbhamilton/puppetlabs-training-bootstrap,petems/puppetlabs-training-bootstrap,petems/puppetlabs-training-bootstrap,petems/puppetlabs-training-bootstrap,kjhenner/puppetlabs-training-bootstrap,samuelson/puppetlabs-training-bootstrap,johnduarte/puppetlabs-training-bootstrap,joshsamuelson/puppetlabs-training-bootstrap,wbhamilton/puppetlabs-training-bootstrap,marrero984/education-builds,klynton/puppetlabs-training-bootstrap