Issue 4: Data from crypto competitions

[redouane-dziri]

• Added data fetched from crypto competition
• Created script to load the data and generate the json file containing the contents (care was taken to remove a header comment found in all submissions from a particular competition to avoid an unwanted bias on what is essentially irrelevant info)
• Ran the script and added the resulting json to the repo

The structure of the files is as follows

| data
     | ---- crypto_competitions
               |   crypto_competitions_data.json
               |   data_to_json.py
               |---- files 
                          file_example.cpp
                          file_example_2.c
                          ....

(see last comments at #1)

If someone has an objection with the preceding structure, happy to discuss it; Will merge if looks good to you