Update README.rst

README.rst

@@ -11,7 +11,8 @@ HTTP/2 and SPDY.
 
 HPACK encoding and decoding are available as public API.
 
-We didn't cover everything, but we have Python binding of this libary.
+We have Python binding of this libary, but we have not covered
+everything yet.
 
 Development Status
 ------------------
@@ -142,6 +143,8 @@ used::
     $ ./configure
     $ make
 
+To compile source code, gcc >= 4.8.3 or clang >= 3.4 is required.
+
 .. note::
 
    Mac OS X users may need ``--disable-threads`` configure option to