Merge pull request #94 from FloEdelmann/dev

Use `*.overpassql` file extension

Author: mattmanley

examples/challenge_examples.py

@@ -49,7 +49,7 @@
                                                                   ).to_json()
 
 # Adding example overpass QL input for challenge
-challenge_data.overpassQL = open('data/Example_OverpassQL_Query', 'r').read()
+challenge_data.overpassQL = open('data/Example_OverpassQL_Query.overpassql', 'r').read()
 
 # Create challenge
 print(json.dumps(api.create_challenge(challenge_data)))