Improved imagTEvol to accept any time step size and simply adjust the last step size if not commensurate.
Removed is_ortho_ flag from MPS/MPO in favor of just using the left and right orth lims.
More efficient contraction pattern for fitApplyMPO. Method which adds an MPS and applies and MPO now returns overlap of result with psiA MPS argument which can be useful in reconstructing certain quantities (in context of adaptive time evolution algorithm).
Removed out of date Opt helper function from idmrg