write binding code

CodeGen/BMapBindings/README.md

@@ -4,3 +4,14 @@ A helper program to generate BMap binding in Python and CSharp
 
 This program is consisted by 2 parts, first is Python part which extract BMap interface function declarations from source file, thus following Antlr step can focus on syntax analyze.  
 Next part is Antlr part. It analyse extracted function declarations and output corresponding Python binding and CSharp binding.
+
+```
+python ExtractBMapFctDecl.py
+
+antlr4 ExpFctsLexer.g4
+antlr4 ExpFctsParser.g4
+
+javac *.java
+java MainRunner
+```
+