Added partials:

- back_to_trip adds link_tags with embedded
- loc_pins displays all posts based on locationpin array
Added partials:

- Shows and indexes now using partials where duplicate code was
Merge conflict on location_show
Merge branch 'nealfennimore-feature/trips_partials'
Merge branch 'master' of https://github.com/spring-peepers-2014/TravelBlog