Load query only the first time

- Load on viewWillAppear only the first time
- Removed location check for query to execute
Remove text from description PostDetails VC

- Remove placeholder text from description textView on PostDetailsVC
- Changed tableViewCell on MyPostsVC
Add interestedButton property
Merge branch 'ivan'
Merge branch 'master' of https://github.com/TijoMONSTER/AdoptAFriend
As a user, I'd like to see my posts on my profile

- Added PFQuery to bring user's posts
- Added cell that shows you when there are no posts
- Added FeedTableViewCell method
layoutCellViewWithDescriptionTextOnly to set only the description