Reader for importing license Information from go-licenses tool

[ohecker]

As a developer using the Go language I want to use Solicitor to create reports on the used licenses.

Therefore I want to import data generated from the go-licenses tool (https://github.com/google/go-licenses).

https://github.com/DaKine23/golitosol is a small tool which creates a Solicitor compatible CSV file from the go-licenses output. This might be taken as a starting point. The "GoLicensesReader" should be a direct replacement, producing the same data model directly from the go-licenses output file.