investigate conditions under which inversions not represented in macrosynteny blocks

[adf-ncgr]

from earlier email exchanges: adf :

One thing while it's on my mind, you had mentioned inversions in the context of the chord view and
I think I have noticed that the new block generation algorithm is not finding them as often as they used to
occur in the precomputed data. I think I had observed something along these lines when I was doing my own
block construction using MCScanX on the gene families, but my impression is that it is more pronounced now
(though I have not verified this, so we may have simply inherited the behavior from the algorithm you chose as
your model?); anyway, I'd say that it would be nice to be able to detect inversions at the macroscale that are at
least as big as the classic example which has 6 matched genes in the inverted segment (I tried cranking the
macro-params to allow detection but it did not appear, though it's certainly possible that I have overlooked
a subtlety); I have a vague recollection that this did appear in Steven's precomputed blocks, but would not
swear to it.

@alancleary

Not sure why this would be happening; inverted blocks are computed the exact same way as forward oriented blocks, and the two result sets have no effect on each other. At least they shouldn't... I'll look into it.