"heroku run" fix which respects rake task exit status

heroku_run.sh

#Usage: heroku_run 'rake db:migrate' veeqo-staging
function heroku_run() {
  buffer_file=/tmp/last_heroku_run_`date +%N`
  heroku run "$1; echo \$?" --app $2 2>&1 | tee $buffer_file
  return `tail -1 $buffer_file`
}