permanently stuck due to different permutations of k_idx lists in sdq

[zacwellmer]

Program will become permanently stuck if sdq contains k_idx lists that are different permutations of one another. This is easily fixed by appending k_idx as sets instead of lists.

Unfortunately I do not know of a dataset that I can use to show this example. Without a usable dataset to exploit this problem it is difficult to write a unittest for this.

[rasbt]

Closing, because I think that's been fixed a long time ago ;) (in Sdq ordering #133)