Errors in data.py

[danlaine]

Problems in data.py:

Line 680: self.contingency doesn't exist. I think you mean contingency.

Lines 689, 691: cmp does not exist.

Line 796: Instance of 'BranchOutEvent' has no 'read_three_winding_from_row' member

Line 1139, 1141: Instance of 'Transformer' has no 'k' member

Line 1284: new_row_len does not exist.

I realize some of these are because there are data fields not used in challenge 1 but they're still making my linter unhappy.

Cheers,
Dan