updates readme and roadmap

readme.md

@@ -45,6 +45,9 @@ https://github.com/zaphoyd/websocketpp/
 **Announcements Mailing List**  
 http://groups.google.com/group/websocketpp-announcements/
 
+**IRC Channel**  
+#websocketpp (freenode)
+
 **Discussion / Development / Support Mailing List / Forum**  
 http://groups.google.com/group/websocketpp/
 

roadmap.md

@@ -41,4 +41,5 @@ Needs work:
 Non-release blocking feature roadmap
 - Extension support
 - permessage_compress extension
-- Message buffer pool
+- Message buffer pool
+- CMake build/install support