Added movies relation to word model, and uniqueness
Added reverse connection; can call .words on a movie
Added dependent destroy for deleting a movie and all associated word, sentence, and join table data
Got words to show and clickable for sentences belonging to
Formatted words show page to include context and time_marker
Nested words into movies
Made notes
Word_count method added for movie model
Words shown on Movies index, with frequencies
Appears to show all show pages properly w frequency and context