Merge pull request #16 from geekphp/patch-1

Nested Set link

Author: dracony

README.md

@@ -27,6 +27,7 @@ PHPixie ORM library
     - [Embedded Models in MongoDB](#embedded-models-in-mongodb)
         - [Embeds One](#embeds-one)
         - [Embeds Many](#embeds-many)
+    - [Nested Set](#nested-set)
 
 
 ## Initializing
@@ -1155,4 +1156,4 @@ $query->in(array($plants, $trees, $flowers))->delete();
 
 > The important part is to remember that `parent` and `children` refer
 > only to the immediate parent an children, while `allParents` and 
-> `allChildren` refer to all related nodes recursively.
+> `allChildren` refer to all related nodes recursively.