Merge pull request #211 from FlorianLudwig/patch-1

"GNU Lesser General Public License" usual abbr. is LGPL

Author: mielvds

README.md

@@ -198,4 +198,4 @@ branch.
 ## License
 
 `hdt-cpp` is free software licensed as GNU Lesser General Public
-License (GPL). See `libhdt/COPYRIGHT`.
+License (LGPL). See `libhdt/COPYRIGHT`.