Make it more obvious what JSON attributes to configure
Switch to .env
More user-friendly error message

Users of Vagrant aren't used to deciphering Ruby exceptions
Remove config shortcuts
Update default.rb
Update .env.erb
Split up writing of Rails config files

Also rename the source from .env.erb to env.sh.erb
Remove omniauth settings from chef.json.example
Clean up environment template by hardcoding a few values
Resolve merge conflicts
Merge pull request #5 from elm-city-craftworks/env

Env
Merge branch 'master' of github.com:elm-city-craftworks/practicing-ruby-cookbook into documentation