Use panel to plot CML map and time series data

[cchwala]

This should hopefully close #2

TODO in this PR:

• plot CML paths on map
• plot time series
• get CML ID from CML by clicking on line in map
• update time series plot
• make things look nicer

[cchwala]

Currently it looks like this

Not pretty, but at least the basic setup works.

Open question: Can I get the interactivity with folium or do I have to use bokeh for plotting the map and maybe use something like ColumnDataSource for storing the CML data and metadata outside of the map plotting function.