Add Application Data to SmarphoneStudyProtocol

[bardram]

To support application-specific configuration of the protocol (in version 0.40.x).

[bardram]

Released as part of CAMS 0.40.6.

Now you can write the following in your study protocol:

    // Create a new study protocol.
    masterProtocol = SmartphoneStudyProtocol(
      ownerId: 'user@dtu.dk',
      name: 'patient_tracking',
    );

    masterProtocol.applicationData = {
      'theme': 'dark',
      'version': 1,
      'question_1': "Hvor'n går det?",
    };