Concentration profile plot with cumulative dose

This MR resolves the 2nd and 5th items from the Report update for MC version issue.

I've modified the C(t) vs time graph to have the cumulative dose as well. To do that, in comparison with feature/mc branch I applied Equation 16 from CERN-OPEN-2021-004.

The plot was built using the d3 library.

Performance:

Before (master):

[I 211019 11:55:41 web:2239] 200 GET /calculator/baseline-model/result (::1) 2164.32ms
[I 211019 11:55:42 web:2239] 200 GET /calculator/baseline-model/result (::1) 370.76ms

After:

[I 211019 11:54:54 web:2239] 200 GET /calculator/baseline-model/result (::1) 2442.11ms
[I 211019 11:54:57 web:2239] 200 GET /calculator/baseline-model/result (::1) 537.44ms