Backend initialize dataset

[skywolf829]

The frontend will send necessary settings to the backend to initialize a Dataset object (see #4 )

Requirements

• In ServerCommunicator, listen for the signal to load a dataset with certain settings. When received, attempt to update the dataset object in ServerController.
• Upon (trying) to load the dataset, return a error code (int) and status (string) pair to the frontend:
• If the dataset cant be created, return an some nonzero error code with a string defining the issue for the frontend to see.
• If the dataset is correctly initialized, return 0 error code with something like "OK" or "Dataset loaded", etc

[skywolf829]

Properly initialized dataset given a path to load, and will return errors if encountered. Also supports a DEBUG mode that doesn't need an actual dataset.