Added base documentation

doc/book/zend.http.client-static.md

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+# HTTP Client - Static Usage
+
+## Overview
+
+The `Zend\Http` component also provides `Zend\Http\ClientStatic`, a static HTTP client which exposes
+a simplified API for quickly performing GET and POST operations:
+
+## Quick Start
+
+```php
+use Zend\Http\ClientStatic;
+
+// Simple GET request
+$response = ClientStatic::get('http://example.org');
+
+// More complex GET request, specifying query string 'foo=bar' and adding a
+// custom header to request JSON data be returned (Accept: application/json)
+$response = ClientStatic::get(
+    'http://example.org',
+    array('foo' => 'bar'),
+    array('Accept' => 'application/json')
+);
+
+// We can also do a POST request using the same format.  Here we POST
+// login credentials (username/password) to a login page:
+$response = ClientStatic::post('https://example.org/login.php', array(
+    'username' => 'foo',
+    'password' => 'bar',
+));
+```
+
+## Available Methods
+
+**get**  
+`get(string $url, array $query = array(), array $headers = array(), mixed $body = null,
+$clientOptions = null)`
+
+Perform an HTTP `GET` request using the provided URL, query string variables, headers and request
+body. The fifth parameter can be used to pass configuration options to the HTTP Client instance.
+
+Returns Zend\\Http\\Response
+
+<!-- -->
+
+**post**  
+`post(string $url, array $params, array $headers = array(), mixed $body = null, $clientOptions =
+null)`
+
+Perform an HTTP `POST` request using the provided URL, parameters, headers and request body. The
+fifth parameter can be used to pass configuration options to the HTTP Client instance.
+
+Returns Zend\\Http\\Response
+
+