created module ``eadtoolbox.validate`` for validating EAD
created module ``eadtoolbox.validate`` for validating EAD

Current capability is limited to validating against the EAD 2002 DTD

bloomonkey/ead-toolbox,bloomonkey/ead-toolbox,RitwikGupta/ead-toolbox,RitwikGupta/ead-toolbox