Added set_canonical2() and some comments
More expressive text output when a comparison fails
In test_linalg_expm.cc, use exp() instead of expm to construct a value with which to test expm.
In test_linalg_svd, assume that the SVD of a unitary does not always return numbers with modulus 1, due to small inaccuracies.
Added a routine to simplify a sum of MPS.
Tests for the extended version of simplify().
Added MPDO objects.
Added apply(MPDO,MPS).
Rename MPDO -> MPO
Added a function (crappy) for expectation values with MPO
Added solve_with_svd().
mps_simplify_many.cc defaults *sense to +1
Added ArnoldiSolver
tensor-config.in keeps the configuration directories.
Eliminate the dependency of test_linalg_expm.cc on libmps
Split out the MPS components, which are now part of libmps