Update lib/handy/heroku_helpers.rb

Removed static user name when do staging to development task.
Fixed typo.
Small fixes. Removing the latest dump were started during the restoring the db.
Merge pull request #4 from miry/patch-1

Update lib/handy/heroku_helpers.rb
look for settings.yml file
add dependency on heroku
add rake to Gemfile
remove dependency on heroku
better description
add Rails logging
changed description
extract into a method
take snapshot of production before
pass production
new release
bug fix and new version
backup production
rake task a2b
fixing typo
exit incase of failure