Add GPL license link
"CC BY-SA": "https://creativecommons.org/licenses/by-sa/3.0/",
"CC BY-SA 3.0": "https://creativecommons.org/licenses/by-sa/3.0/",
"CC BY-NC": "https://creativecommons.org/licenses/by-nc/3.0/",
- "CC BY-NC 3.0": "https://creativecommons.org/licenses/by-nc/3.0/"
+ "CC BY-NC 3.0": "https://creativecommons.org/licenses/by-nc/3.0/",
+ "GPL": "http://www.gnu.de/documents/gpl.en.html"
},
"MODEL_ACCURACY": {
