add show_prep_release_usage and show_release_usage functions
rename methods by adding _and_exit to be clearer
Merge pull request #3 from JamesLavin/add_heroku_config_functions

Add heroku config functions
fix examples (I put the staging examples under production and vice versa)
Merge pull request #4 from JamesLavin/fix-roboconf-examples

fix examples (I put the staging examples under production and vice versa...
attempt to fix double equals sign bug
attempt to fix double equals sign bug
commenting out Heroku setting to test the script
add debugging statement while testing the script
change regex matching to (hopefully) fix problem of special characters
uncomment 'heroku config:add' since no longer testing
update 'heroku config:add' to 'heroku config:set'
Merge pull request #5 from JamesLavin/fix-double-equals-sign-bug

Fix double equals sign bug
create fire_up_heroku_app function
wrap fruit in fruit
Merge pull request #6 from JamesLavin/create-fire-up-heroku-app

create fire_up_heroku_app function
extract (and clarify) heroku_addon function
create show_config_usage_and_exit
Merge pull request #7 from JamesLavin/create-add-heroku-addon

extract (and clarify) heroku_addon function