Added the missing Antlr 2.7 license file
diff --git a/LICENSE b/LICENSE
index 899b635..0a986c6 100644
--- a/LICENSE
+++ b/LICENSE
@@ -329,4 +329,20 @@
California, USA. All Rights Reserved. Permission to copy and
distribute verbatim copies of this document is granted.
+==========================================================================
+ANTLR 2 License
+--------------------------------------------------------------------------
+
+We reserve no legal rights to the ANTLR--it is fully in the public domain. An individual or company
+may do whatever they wish with source code distributed with ANTLR or the code generated by ANTLR,
+including the incorporation of ANTLR, or its output, into commerical software.
+
+We encourage users to develop software with ANTLR. However, we do ask that credit is given to us
+for developing ANTLR. By "credit", we mean that if you use ANTLR or incorporate any source code
+into one of your programs (commercial product, research project, or otherwise) that you acknowledge
+this fact somewhere in the documentation, research report, etc... If you like ANTLR and have developed
+a nice tool with the output, please mention that you developed it using ANTLR. In addition, we ask that
+the headers remain intact in our source code. As long as these guidelines are kept, we expect to
+continue enhancing this system and expect to make other tools available as they are completed.
+
