Add response time correction

[markusritschel]

The response time after a shock (e.g. induced via calibration or by crossing a front) may differ depending on the amplitude of the shock etc.
Use the results from ICOS alongside other methods to recover the true signal.

Determine the time step of the shock with gradient-based detection and the value at which equilibrium is reached again.
Then, determine the "time constant", i.e. the time span at which 1/e of the equilibrium value is reached starting from the shock.