trying out new kktsolver
MAINT: preserve compatibility with backwards incompatible change in numpy 1.10
trying new kkt solver
last hurrah for new kkt solver
reverting to old kkt solver
removing debugging info
Merge pull request #157 from argriffing/update-diag

MAINT: preserve compatibility with backwards incompatible change in numpy 1.10
more efficient lambda*
made kktsolver and refinement cvxopt solver options
added upper_tri atom