Manuel Carmona

@dpaz You should add tests for new functionality

As [linguist's README says](https://github.com/github/linguist/blob/master/README.md): `Add a .gitattributes file to your project and use standard git-style path matchers for the files you want to override...`, If we have a different way...

You must give to `pga get -i` a sequence of siva file names as in: ``` c13587212de574c5dadeac9fa483367d53717abe.siva 05ea82f75e9ba7c2158e94dd4a714d359d0cab02.siva cce947b98a050c6d356bc6ba95030254914027b1.siva 9e7f20d3c0a40a715f993db75adfbf56e268a30a.siva db191acb9884be36ec15e35bde798c449d26bebe.siva 65c397a8673c0f4b98e3867e5fd6efdaa7d9ccd2.siva 338126bc0b8a7b447acf1830030a39c16bc39195.siva 6bc52531e707eb4b9b875c418a84f2e100ff6e73.siva 738658b11c94345a8003fa41b5d19f39b09bba7f.siva 5d7303c49ac984a9fec60523f2d5297682e16646.siva ``` Using `pga list...

It should be the same in windows, there is a version of `jq` for it https://stedolan.github.io/jq/download/

I thinks is a good idea adding a filter for empty languages, it'd play also as an example/documentation for this specific case which couldn't seem obvious at a first glance.