- added unset property option to ReadWrite document

- updated ReadWrite unittest

library/Solarium/Autoloader.php

@@ -75,7 +75,7 @@ class Solarium_Autoloader
      */
     static public function load($class)
     {
-        if (substr($class,0,8) == 'Solarium') {
+        if (substr($class, 0, 8) == 'Solarium') {
 
             $class = str_replace(
                 array('Solarium', '_'),

library/Solarium/Document/ReadWrite.php

@@ -218,4 +218,17 @@ class Solarium_Document_ReadWrite extends Solarium_Document_ReadOnly
         $this->setField($name, $value);
     }
 
+    /**
+     * Unset field value
+     *
+     * Magic method for removing fields by unsetting object properties
+     *
+     * @param string $name
+     * @return void
+     */
+    public function __unset($name)
+    {
+        $this->removeField($name);
+    }
+
 }
\ No newline at end of file

tests/Solarium/Document/ReadWriteTest.php

@@ -212,6 +212,19 @@ class Solarium_Document_ReadWriteTest extends PHPUnit_Framework_TestCase
         );
     }
 
+    public function testUnsetFieldByProperty()
+    {
+        unset($this->_doc->name);
+
+        $expectedFields = $this->_fields;
+        unset($expectedFields['name']);
+
+        $this->assertEquals(
+            $expectedFields,
+            $this->_doc->getFields()
+        );
+    }
+
     public function testSetFieldAsArray()
     {
         $this->_doc['name'] = 'newname';