Correlate details.txt with events.txt

[gmacario]

By inspecting https://github.com/SOLARMA/pv-analysis-tools/blob/master/data/2019-10-05-solpev-danfoss-weblogger/details.txt it looks like there are a few missing records in the file.

They are most likely related to the errors reported in https://github.com/SOLARMA/pv-analysis-tools/blob/master/data/2019-10-05-solpev-danfoss-weblogger/events.txt

I would suggest to improve DetailedPlots.ipynb to make it clear that there the missing samples due to errors - for instance by plotting a different marker in correspondence of the time of the error