add logic so only the trips a user created are displayed
remove Add Location button

- Redundant and when clicked, directed a user back to the index
change placeholder text to be more informative
locations now display in reverse order:

- Last created show up at the top, but still need to implement prepending them when creating in the JS
posts now appear in reverse order
fix spelling of Pittsburgh
after posting, direct user to page showing all locations for a trip
add logic to flash message if user attempts to add a location that already exists in that trip

- However, message will not display unless it is checked for on the JS side
Merge branch 'master' of https://github.com/spring-peepers-2014/TravelBlog
Merge pull request #124 from Lrmanfre/bugfix/various-bugfixes

Fix/User can only see own posts
Fix/Typo in seed data
Fix/Direct user to trip view of all posts after creating a new post
Fix/Remove inactive 'Add Location' button
Feature/Posts displayed by order of creation
Feature/Placeholder text in input fields more informative