cvxpy

c97e2bb4 - Merge branch 'master' of github.com:cvxpy/cvxpy

Merge branch 'master' of github.com:cvxpy/cvxpy * 'master' of github.com:cvxpy/cvxpy: Update performance_utils.py (#1437) Fix Constant.is_psd() and Constant.is_nsd() (#1456)