Added class to the type select of each of a prisoner's incidents and prints to console.log whenever type select changes.
Replaced coffeescript code with javascript, accessed the subtype select corresponding to type select when the type select changes.
Moved dynamic repopulation of subtype select into prisoners.js.
Clarified comment in prisoners.js
Repopulating subtype select with selected type's subtypes when type select changes.
Loading subtype map for new, edit and update functions in prisoner controller.
Adapted prisoners.js for javascript caching gem Turbolinks so that javascript would reload when navigating within the application.