Changes according to the threads, using histogram += hist and histogram /= np.amax(histogram) leads to error because of wrong shape

Resolve "create CNN model class"

See merge request !271

index array was missing

See merge request !296

# Conflicts:
#   mlair/plotting/data_insight_plotting.py

Resolve "better understanding why station is removed in preprocessing"

See merge request !276

Resolve "add offset to Seperation of Scales data handler"

See merge request !294

Resolve "adjust min/max scaler"

See merge request !293

min max scaler can now read parameter feature_range to set normalization interval, default is [0, 1], /close #302 on pipeline pass

Resolve "improve datastore logging"

See merge request !292

appendix include time tracking for plots

See merge request !290

Resolve "histogram of inputs and targets"

See merge request !288

include plot script restructuring

See merge request !289

Resolve "periodogram for kzf"

See merge request !287

moved plotting back from preprocessing to postprocessing to have a single location where all plots are created

Resolve "refac: limit axis in competing skill score plot"

See merge request !286