web service MDL-12886

* Remove description array => all these information are now into the phpdoc. Remove all call/reference to moodleexternal.php
* Adapt our own REST server to these changes
* Remove Zend REST server as it's going to be deprecated in Zend Framework 1.8
* Remove our own SOAP server as we use the Zend SOAP server

webservice/rest/server.php

@@ -41,7 +41,6 @@ if (empty($CFG->enablewebservices)) {
     die;
 }
 
-
 $server = new rest_server();
 $server->run();