Xarray pipeline

[nilsnevertree]

A xarray pipeline is implemented for a more general way of

• [x] creating data,
• [x] applying the Kalman_SEM algorithms
• [x] make experimentats
• [x] perform analysis (still open)
• [x] visualization

[nilsnevertree]

With the first commits #38 should be solved.

[nilsnevertree]

With this pull request multiple issures should be solved:

• [x] #39
• [x] #48
• [x] #37
• [x] #33
• [x] #31
• [x] #41