doc: include full license text for GitHub detection
doc: include full license text for GitHub detection

GitHub doesn't currently detect the license of this project, but it
should once the full license text is there.

bucharest-gold/license-reporter,lgriffin/license-reporter,lgriffin/license-reporter,helio-frota/license-reporter,bucharest-gold/license-reporter,helio-frota/license-reporter