Fix spec bugs on numericality
Adds Bootstrap and Style pages
Create error partial
Fix edit/update function for stations.
Create Stops controller and new stop view
Create dropdown menus to select station and line to create a stop.
Add checkboxes for stations in the lines form.
Add checkboxes for lines in the station form.
Add dependent destroy to stations and lines to delete stops.
Add list lines on station show page.
Add list stations on line show page.
Change README file