flash messages now display on the trip show page

* Used foundation rails flash helper to style and display message
merged master
Merge pull request #71 from LightningLord/display_errand_flash

flash messages now display on the trip show page
Merge branch 'master' of https://github.com/LightningLord/errandsontheway into style_trip_show

Conflicts:
	app/views/trips/show.html.erb