Further development on Rijkswaterstaat demo

[LibbyTang]

From PR #15, the following features have been developed:

• Make the parser work with new data
• Improve display: make it larger, remove other components
• Change the colour of the heatmap to be less red and to see accidents better

Here are the further tasks that need to be done based on the meeting:

• Make two different heat maps for the left and right side
• Make wiring between a click on a point and its details
• Highlight point on click