adds belongs_to trip in chapter model
creates chapter controller
cleans up trip partial
closes div
adds nested routes for chapters
removes id from partial
creates the instance variables for new and create methods, creates strong params
 adds @chapters instance variable for show view
 uncomments has many chapters
 adds render @chapters
 creates chapter partial, creates form patial, creates new view for chapter that renders _form
Merge branch 'master' of https://github.com/pocus/mondiale