update screen title
Merge branches 'master' and 'master' of https://github.com/dst-hackathon/socialradar-android

# By sam35060
# Via sam35060
* 'master' of https://github.com/dst-hackathon/socialradar-android:
  add ImageDownloader class and update home page.

# By sam35060
# Via sam35060
* 'master' of https://github.com/dst-hackathon/socialradar-android:
  add ImageDownloader class and update home page.