Returns true if you need to call "CreateStoreHouse" before storing any data. This method is "Missing" not "Exists" because implementations that do not use a store house (I.E. single-file-based data access layers) can return "false" from this method without breaking either a user's app or the spirit of the method. Store house typically corresponds to "database". For SQLite, this merely verifies the file exists, not that you have any particular security permissions or even that it is a valid SQLite database.
