Fixed #6551: clarify the meaning of ``DATABASE_NAME`` for SQLite in docs/tutorial01.txt

    * ``DATABASE_ENGINE`` -- Either 'postgresql_psycopg2', 'mysql' or 'sqlite3'.

      Other backends are `also available`_.

    * ``DATABASE_NAME`` -- The name of your database, or the full (absolute)

      path to the database file if you're using SQLite. 

    * ``DATABASE_NAME`` -- The name of your database. If you're using

      SQLite, the database will be a file on your computer; in that

      case, ``DATABASE_NAME`` should be the full absolute path,

      including filename, of that file. If the file doesn't exist, it

      will automatically be created when you synchronize the database

      for the first time (see below).

    * ``DATABASE_USER`` -- Your database username (not used for SQLite).

    * ``DATABASE_PASSWORD`` -- Your database password (not used for SQLite).

    * ``DATABASE_HOST`` -- The host your database is on. Leave this as an