Merge pull request github#94 from adriens/master

Upgrade site-maven-plugin to 0.12

Author: cescoffier

README.md

@@ -128,7 +128,7 @@ prefix of `ghSite`.
     <plugin>
       <groupId>com.github.github</groupId>
       <artifactId>site-maven-plugin</artifactId>
-      <version>0.9</version>
+      <version>0.12</version>
       <configuration>
         <message>Creating site for ${project.version}</message>
       </configuration>