Add visualisations in Meteor

[openp2pdesign]

Visualisations are currently missing from Meteor (the most relevant missing part now); ideally they all should have the same style/configuration. For this reason the best option so far is Plotly, already added and implemented with a simple case. Vega could be an alternative, but the configuration is more complex.

Plotly should then be:

• completely integrated
• chart type should be read from the database
• chart configuration should be read from database
• chart layout should be finalised

Two things are missing or partially missing in Plotly:

• Mapping, especially when using tiles, is a bit limited (it requires a MapBox token). Leaflet is a good option here, especially when adding heatmaps.
• Graphs / Networks are missing, these are the most likely candidates:
  • D3
  • SigmaJS
  • CytoscapeJS