Add a Landing Activity.
Merge branch 'master' of https://github.com/dst-hackathon/socialradar-android
Remove Login with Facebook account.
Merge branch 'master' of https://github.com/dst-hackathon/socialradar-android
Add a logic to check if user is logged in.
Merge branch 'master' of https://github.com/dst-hackathon/socialradar-android