Enhancements

[ilude]

I have added a few minor enhancements:

1. updated spec_helper.rb to avoid depercation warnings from older rspec syntax.

2. added an echo command to print out messages while deploying

3. added a -f | --force option to the command line to allow git push --force when deploying

   Occasionally the deploy server gets itself out of sync with origin/master, usually because of a team member who does something odd with their git repo. This allows saving the step of logging into the production server to sort it out.

4 added the newrelic_deployment_marker.
Yes its syntactic sugar. But its optional and handy to have the syntax built in.

5.updated the README.markdown documentation
Including an example of how to set RAILS_ENV when doing deployments to staging vs production

[ilude]

Oh, one note I forgot to add: its all backward compatible, none of this should break any existing config/gitploy.rb.