A compatibility update of Peppe's Double Reach mod for Factorio 0.15.

Given that all I did was change a few lines in info.json, I cannot by any stretch of the imagination claim authorship.

I do feel, however, that it fills a gap between the somewhat stingy reach allowance of Vanilla and the OPness of LongReach - particularly if you are working on live rail!

Hence the reason I've ported this for Factorio 0.15,