Add script to download the necessary data

Author: juliusgh

Diff for: download_data.sh

@@ -0,0 +1,12 @@
+OPTIONS="-q --show-progress"
+DATASET=https://darus.uni-stuttgart.de/api/access/datafile/:persistentId\?persistentId\=doi:10.18419/darus-2822
+wget $OPTIONS $DATASET/9 -O input/striped_normal_4x4x4.h5  # microstructures[0]
+wget $OPTIONS $DATASET/8 -O input/sphere_normal_16x16x16_10samples.h5  # microstructures[1]
+wget $OPTIONS $DATASET/3 -O input/sphere_normal_32x32x32_10samples.h5  # microstructures[2]
+wget $OPTIONS $DATASET/10 -O input/sphere_combo_16x16x16_10samples.h5  # microstructures[3]
+wget $OPTIONS $DATASET/4 -O input/octahedron_normal_16x16x16_10samples.h5  # microstructures[4]
+wget $OPTIONS $DATASET/6 -O input/octahedron_combo_16x16x16_10samples.h5  # microstructures[5]
+wget $OPTIONS $DATASET/11 -O input/octahedron_combo_32x32x32.h5  # microstructures[6]
+wget $OPTIONS $DATASET/2 -O input/random_rve_vol20.h5  # microstructures[7]
+wget $OPTIONS $DATASET/5 -O input/random_rve_vol40.h5  # microstructures[8]
+wget $OPTIONS $DATASET/1 -O input/random_rve_vol60.h5  # microstructures[9]

Diff for: readme.md

@@ -23,6 +23,8 @@ route and show their limitations in view of both accuracy and the amount of requ
 - Input
   dataset: [![Identifier](https://img.shields.io/badge/doi-10.18419%2Fdarus--2822-d45815.svg)](https://doi.org/10.18419/darus-2822)
 
+All necessary data can be downloaded from [DaRUS](https://darus.uni-stuttgart.de/) using the script `download_data.sh`.
+
 ## How to use?
 
 The provided code is independent of direct numerical simulators, i.e. it expects DNS results to be stored in a HDF5 file with a