Added brief example to the readme

Added a brief example in the readme file underneath the shortcut methods. Will add a detailed example in the wiki once approved.

Author: dpDesignz

README.md

@@ -147,6 +147,15 @@ notBetween('column', $value, $value2)
 // $value will protected by either using escape or prepare statement
 ```
 
+```php
+// To allow simple grouping of basic $whereConditions,
+// wrap the following around a group of the above comparison
+// expressions within the where( ...$whereConditions) clause
+grouping( eq(key, value, combiner ), eq(key, value, combiner ) )
+// The above will wrap beginning and end grouping in a where statement
+// where required to break down your where clause.
+```
+
 ```php
 // Supply the the whole query string, and placing '?' within
 // With the same number of arguments in an array.