Update README.md

Author: donatj

README.md

@@ -4,8 +4,13 @@
 
 A collection of global `array_*` functions appending to the native PHP set.
 
-- `array_flatten`
-- `array_blend`
-- `array_key_array`
-- `array_keys_array`
-- `array_key_refill`
+- `array_flatten( array $array, $allow_duplicates = false )` 
+	- Given an array, find all the values recursively.
+- `array_blend( array $arrays, array $keys = null )` 
+	- Given an array of arrays, merges the array's children together.
+- `array_key_array( array $arrays, $key )` 
+	- Given an array of similarly keyed arrays, returns an array of only the values of the key.
+- `array_keys_array( array $arrays, $keys )` 
+	- Given an array of similarly keyed arrays, returns an array of only the selected keys.
+- `array_key_refill( array $array, $keys, $fill = array() )` 
+	- Given a keyed array, fills any missing values.