[Docs] Adds missing file for intro - See #8

doc/book/zend.server.md

@@ -0,0 +1,12 @@
+# Introduction to Zend\\Server
+
+The `Zend\Server` family of classes provides functionality for the various 
+server classes, including `Zend\XmlRpc\Server` and `Zend\Json\Server`. 
+`Zend\Server\Server` provides an interface that mimics PHP 5’s `SoapServer` 
+class; all server classes should implement this interface in order to provide a
+standard server API.
+
+The `Zend\Server\Reflection` tree provides a standard mechanism for performing 
+function and class introspection for use as callbacks with the server classes, 
+and provides data suitable for use with `Zend\Server\Server`‘s `getFunctions()`
+and `loadFunctions()` methods.