Upgraded skeleton files to latest version

package.xml

@@ -1,8 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<package packagerversion="1.9.1" version="2.0" xmlns="http://pear.php.net/dtd/package-2.0" xmlns:tasks="http://pear.php.net/dtd/tasks-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pear.php.net/dtd/tasks-1.0
-    http://pear.php.net/dtd/tasks-1.0.xsd
-    http://pear.php.net/dtd/package-2.0
-    http://pear.php.net/dtd/package-2.0.xsd">
+<package xmlns="http://pear.php.net/dtd/package-2.0" xmlns:tasks="http://pear.php.net/dtd/tasks-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" packagerversion="1.9.1" version="2.0" xsi:schemaLocation="http://pear.php.net/dtd/tasks-1.0     http://pear.php.net/dtd/tasks-1.0.xsd     http://pear.php.net/dtd/package-2.0     http://pear.php.net/dtd/package-2.0.xsd">
   <name>${project.name}</name>
   <channel>${project.channel}</channel>
   <summary>An easy-to-use PHP library for helping with Programming By Contract in PHP</summary>
@@ -56,7 +53,7 @@ ${contents}
       </package>
     </required>
   </dependencies>
-  <phprelease />
+  <phprelease/>
   <changelog>
     <release>
       <version>