added spec for resolving ark as url
added spec for resolving ark as url

CrossRef/lagotto,ankurpohekar/Lagotto,ankurpohekar/Lagotto,CrossRef/lagotto,articlemetrics/lagotto,lagotto/lagotto,articlemetrics/lagotto,lagotto/lagotto,lagotto/lagotto,msingh05/lagotto,ankurpohekar/Lagotto,ankurpohekar/Lagotto,msingh05/lagotto,ankurpohekar/Lagotto,msingh05/lagotto,ankurpohekar/Lagotto,CrossRef/lagotto,articlemetrics/lagotto,ankurpohekar/Lagotto