* Use JSON response for nearby places
* Move okhttp calls to a different class
* wip
* Fetch picture of the day using JSON API
* Search images using JSON APIs
* tests
* Fix injection based on code review comments
* Use wrapper for accessing shared preferences across the app
* Use Json kv store for storing place object
* Fix tests
* Fix test failure
* Fix UI tests
* Show campaigns
* Added a ui util class SwipableCardView which passes the onSwipe event to its children
* NearbyCardView & CampaignView extend SwipableCardView
* Fetch campaigns in ContributionsFragment
* Added an option to enable disable campaign in Settings/Preferences
* synced strings with master
* removed duplicate initialsation of CampaignPresenter