Added support for 'scp', 'scpexe', 'sftp' site deployments to avoid to following error while deploying the website:

Unsupported protocol: 'scpexe' for site deployment (...).

git-svn-id: https://svn.apache.org/repos/asf/directory/studio/tags/2.0.0.v20120111@1230519 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index f353042..794f989 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1733,6 +1733,20 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-site-plugin</artifactId>
+        <dependencies>
+          <!-- Add support for 'scp'/'sftp' -->
+          <dependency>
+            <groupId>org.apache.maven.wagon</groupId>
+            <artifactId>wagon-ssh</artifactId>
+            <version>2.1</version>
+          </dependency>
+          <!-- Add support for 'scpexe' -->
+          <dependency>
+            <groupId>org.apache.maven.wagon</groupId>
+            <artifactId>wagon-ssh-external</artifactId>
+            <version>2.1</version>
+          </dependency>
+        </dependencies>
         <configuration>
           <reportPlugins>
             <plugin>