add copy method

.semver

@@ -1,5 +1,5 @@
 ---
 :major: 1
 :minor: 0
-:patch: 2
+:patch: 3
 :special: ''

Lib/ActiveRecord/ActiveRecord.php

@@ -336,6 +336,18 @@ public function save() {
 	public function jsonSerialize() {
 		return $this->_Record;
 	}
+
+	/**
+	 * Copy record without associations and primary key
+	 * 
+	 * @return ActiveRecord
+	 */
+	public function copy() {
+		$that = $this->getModel()->createActiveRecord(
+				array($this->getModel()->primaryKey => null) + $this->_Record
+		);
+		return $that;
+	}
 
 	protected function _saveBelongsTo() {
 		foreach ($this->_associations as $Association) {