Log Message:
Updating package for MooseX::AttributeHelpers from 0.19 to 0.20

Upstream changes:
0.20 Thu June 25, 2009
	- MXAH is moving into core. This module will be deprecated when
	  that finally happens.
	- Remove register_implementation methods from the traits because
	  we don't want to conflict with cored AttributeHelpers. You'll need to
	  specify the full package name for traits --
	  MooseX::AttributeHelpers::Trait::Counter instead of Counter
	- New provided method for hashs: elements (Returns the key, value
	  pairs in the hash as a flattened list) (plu)