Helper utilities for manipulating Simulink models

Usage:

python3 model_preprocess.py --sys=INPUT_PATH --outdir=OUTPUT_PATH --postprocess=True/False

If INPUT_PATH is a single file, then just pre-processes that file and writes the new file in OUTPUT_PATH. In case of directory, processes all files in INPUT_PATH

The script also writes the unique "keywords" in a text file in OUTPUT_PATH

postprocess denotes whether to apply various post-processing functions, e.g. interleaving blocks and lines