Feature/SWS-4 show data in a graph

Created by: bramnh

• Corrected the fetching of measurements

  • Added 'closed' callback
  • Do not call 'connected' ourselves
  • Assigned series at initialization
  • Put values into the series on fx thread

• Added logo

• Added missing files

• Changed logo

• Changed project version to java 9

• Added some new features to the graphs: - range selection - data nodes - cursor changes - layout, css changes

  Created new logo and added as program icon

  Added java documentation comments to the code

• fixed a bug where the API would receive all data on reconnect and added the features to the readme file