4.0.1

Bug fix release. The genome_size wasn't being set after loading a genome index.

4.0 Release with updated indexing algorithm

GnuMAP v4.0 using the fm-index as the underlying reference genome indexing algorithm.

4.0 Mac release

4.0 release with fm-index for MacOS. Tested on MacOS Sierra 10.12.1 and 10.12.3.