First attempt of creating a Climate Change Profile Plugin for RegIklim users

This is my first attempt at creating a multi-model Ensemble statistics and handing it over to the regiklim users. The idea is to let the user choose a multi-model setup (5 x 5 Matrix by default). The code creates an ensemble comparison of maps and mulit-year annual cycle time series, along with some more information. I also had the idea to run this plugin on a jupyter-notebook, this way we can generate a link the users can click enabling them to reload the data and continue more in-depth analysis on the dkrz jupyterhub.

@b380039 @b380630 @g300050 please have a look at the code.

An example results can be found here: https://www-regiklim.dkrz.de/history/1256/results/.

What do you reckon?