Update main.py to handle empty lines in stations file
Update main.py to handle empty lines in stations file

Currently, if there is a newline at the beginning of the csv file or at the end, `main.py` throws

```
Traceback (most recent call last):
  File "test.py", line 11, in <module>
    name, url = [s.strip() for s in row]
ValueError: not enough values to unpack (expected 2, got 0)
```

In order to ignore the empty `row`, a condition is added.
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