mauve 2.3.1: New formula

Multiple Genome Alignment Visualization
http://gel.ahabs.wisc.edu/mauve/

Mauve is a system for efficiently constructing multiple genome
alignments in the presence of large-scale evolutionary events such as
rearrangement and inversion.
Merge pull request #3082 from sjackman/mauve

mauve 2.3.1: New formula