Update LICENSE.md

MCStreetguy · MCStreetguy · commit dee714032cfc · 2017-07-20T20:52:00.000+02:00
diff --git a/LICENSE.md b/LICENSE.md
@@ -29,3 +29,9 @@ Software or the use or other dealings in the software.***
 ### External Sources
 
 **All external sources used within this package are subject to their licenses and respective owners.**
+
+They are not associated with this license. This applies to imported sources,
+to contents that are part of the source code and to contents that are not
+authored by the copyright holder. External content that is part of the source
+code is labeled by a comment containing the source's name and uri. Contents that
+are not authored by the copyright holder are located within the `externals/` folder.
diff --git a/externals/.gitkeep b/externals/.gitkeep
@@ -0,0 +1 @@
+.
