delay_load parameter dropped in
reticulate::import_from_path, per changes in
Cleaned up hooks into reticulate for commercial solvers.
Updated Solver.solve to adapt to new ECOSolveR. Require version 0.4 of ECOSolveR now.
unpack_results to behave exactly like in CVXPY. Added documentation and testthat tests. Documented in Getting Faster Results article.