Created trainlisting migration
Added train_line, route_name, run_number, and operaator_id attributes
Train Listing model
Added validations
Generated train schedule model and migration
Added trainschedule id column to trainlistings table
Setup trainschedule migration, added associations for trainschedule and trainlisting
Fixed typo in associations
Setup seeds for initial csv file
Updated seed task
Updated issue with seed file
Added listings to index controller
Outputted train schedule to view
Added basic table styles