Remove extra trailing newlines
Verbosify provision scripts, clean up, make chruby version a variable
Don't depend on pwd being $HOME when creating workspace symlink
Silence curl when fetching chruby and Heroku install script
Split cleanup part of provision into separate script, run last
Remove downloaded Ruby source, download chruby to /usr/local/src too

How did I miss this? Saves over 80MiB in the generated image!
Enable persistent history in IRB config