added first line with explanation for each file

examples/ReproducableCode/Compressibility.py

examples/ReproducableCode/Convergence.py

...s/ReproducableCode/DoubleLayerCapacity/Compressibility.py

examples/ReproducableCode/DoubleLayerCapacity/Lambda.py

examples/ReproducableCode/DoubleLayerCapacity/Molarity.py

examples/ReproducableCode/DoubleLayerCapacity/Solvation.py

...bleCode/DoubleLayerCapacity/ValidationAnalyticalMethod.py

...bleCode/OneDimensionalEquilibrium-AnInstructiveExample.py

examples/ReproducableCode/PoissonBoltzmann.py

examples/ReproducableCode/Solvation.py

examples/ReproducableCode/TernaryElectrolyte.py