README in rucy-0.1.2 vs README in rucy-0.1.3

@@ -1,4 +1,31 @@
 
 = Rucy - A Ruby C++ Extension Helper Library
 
-== by [e-mail]
+ by [e-mail]
+
+
+= What is this library?
+
+This library helps you to develop Ruby C extension library with few useful
+classes.
+
+* Wrap VALUE for easy handling.
+* Exception safe (Rucy/C++).
+
+
+= How to use
+
+$ gem install rucy
+
+write C++ source like ext/rucy/tester.cpp.
+
+
+= Examples
+
+see ext/rucy/tester.cpp.
+
+
+= Contact information.
+
+Web:  http://blog.xord.org/
+Mail: [e-mail]