Add minimum Ruby version; some seem intent on using random older things; #1 #1 #11
Split Sinatra routing into controller from App; app should be for configuration
Small readme change, highlight its zero based list
The change for this release
Bump to version 1.2.1
Styling change; alter method name to file_id_valid?
Merge branch 'add-min-ruby-v' into 121-release

* add-min-ruby-v:
  Add minimum Ruby version; some seem intent on using random older things; #1 #1 #11