Allow for ignoring reverse complements when checking neighbours

[hmusta]

Since the k-mer lookup methods allow for ignoring reverse complements when checking the dictionary, I adapted the neighbourhood search methods to also allow for this.

I'm not sure if the current way of implementing neighbourhood searches is intended behaviour or a bug since the paper mentions that you consider both orientations of a k-mer to be equivalent.

Please let me know if you have any comments or if you'd like me to adapt some unit tests to check this extra functionality.

[jermp]

Hi Harun and thanks for this! The bool was indeed necessary.

I'm not sure if the current way of implementing neighbourhood searches is intended behaviour or a bug since the paper mentions that you consider both orientations of a k-mer to be equivalent.

The correct implementation is the one you provided, with the bool being true.
Note however that there is no inconsistency with the paper nor its results, since I only benchmarked lookup not navigational queries.