Scripts for transforming between coordinate systems

The primary payload of this pull request is my latest commit to the `refactor` branch, which I haven't kept in sync with my personal repository. However, this latest commit is a feature requested by @vpbrendel: to be able to convert from scaffold-based coordinates to iLocus-based coordinates and back again. Two scripts in the `data/scripts` directory handle these conversions: `glb2lcl.pl` and `lcl2glb.pl`. The first script is designed to take output from LocusPocus run in `--verbose` mode, and the second script is designed to take output form the first script.