JsonCpp is now licensed under MIT license, or public domain if desired and recognized in your jurisdiction.

diff --git a/doxybuild.py b/doxybuild.py
index 0a31aae..03ad68d 100644
--- a/doxybuild.py
+++ b/doxybuild.py
@@ -127,6 +127,7 @@
         tarball_sources = [
             output_dir,
             'README.txt',
+            'LICENSE',
             'NEWS.txt',
             'version'
             ]