Version to 0.4.0 for release

Author: mbax

README.md

@@ -43,7 +43,7 @@ Repository URL: `http://repo.kitteh.org/content/groups/public/`
 ```xml
 <groupId>org.kitteh.irc</groupId>
 <artifactId>client-lib</artifactId>
-<version>0.3.10</version>
+<version>0.4.0</version>
 ```
 
 ![KICL HAS A BAD LOGO](http://i.imgur.com/KCUNexy.png)

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>org.kitteh.irc</groupId>
     <artifactId>client-lib</artifactId>
-    <version>0.4.0-SNAPSHOT</version>
+    <version>0.4.0</version>
 
     <packaging>jar</packaging>