1. Created models to represent bus stops and bus routes.
2. Created Database and DatabaseManager classes to create and manage
SQLite database for storing bus stops and bus routes.
3. Created BusStopLoader classes to convert jSON from file or server to
POJO and store in database.
4. Created IntentServices to call BusStopLoaders.
5. Created jSON files to hold initial set of bus stops and bus routes.