Update DML ref for rev, sign, cholesky, and aggregate
Update DML ref for rev, sign, cholesky, and aggregate

Also fix a table alignment needed after changing page fonts.

Closes #39.

iyounus/incubator-systemml,nakul02/systemml,deroneriksson/systemml,niketanpansare/systemml,deroneriksson/incubator-systemml,asurve/arvind-sysml2,deroneriksson/incubator-systemml,dusenberrymw/incubator-systemml,iyounus/incubator-systemml,akchinSTC/systemml,iyounus/incubator-systemml,nakul02/incubator-systemml,nakul02/incubator-systemml,dusenberrymw/systemml,gweidner/systemml,sandeep-n/incubator-systemml,akchinSTC/systemml,asurve/incubator-systemml,asurve/arvind-sysml2,dhutchis/systemml,apache/incubator-systemml,asurve/systemml,asurve/incubator-systemml,dusenberrymw/systemml,asurve/systemml,sandeep-n/incubator-systemml,nakul02/incubator-systemml,apache/incubator-systemml,niketanpansare/systemml,dhutchis/systemml,dusenberrymw/systemml,deroneriksson/incubator-systemml,dusenberrymw/systemml,deroneriksson/incubator-systemml,dhutchis/systemml,asurve/arvind-sysml2,dusenberrymw/incubator-systemml,asurve/systemml,deroneriksson/incubator-systemml,sandeep-n/incubator-systemml,deroneriksson/systemml,Wenpei/incubator-systemml,gweidner/incubator-systemml,asurve/arvind-sysml2,niketanpansare/systemml,dusenberrymw/incubator-systemml,akchinSTC/systemml,niketanpansare/incubator-systemml,gweidner/incubator-systemml,gweidner/incubator-systemml,apache/incubator-systemml,asurve/arvind-sysml2,iyounus/incubator-systemml,dhutchis/systemml,Wenpei/incubator-systemml,apache/incubator-systemml,gweidner/incubator-systemml,asurve/incubator-systemml,nakul02/systemml,fschueler/incubator-systemml,gweidner/systemml,akchinSTC/systemml,nakul02/incubator-systemml,fschueler/incubator-systemml,deroneriksson/systemml,asurve/incubator-systemml,gweidner/systemml,dusenberrymw/systemml,deroneriksson/systemml,nakul02/systemml,asurve/systemml,gweidner/systemml,akchinSTC/systemml,deroneriksson/incubator-systemml,fschueler/incubator-systemml,asurve/incubator-systemml,akchinSTC/systemml,fschueler/incubator-systemml,iyounus/incubator-systemml,dusenberrymw/incubator-systemml,niketanpansare/systemml,gweidner/systemml,niketanpansare/systemml,gweidner/systemml,asurve/systemml,iyounus/incubator-systemml,asurve/incubator-systemml,asurve/arvind-sysml2,Wenpei/incubator-systemml,nakul02/incubator-systemml,Wenpei/incubator-systemml,niketanpansare/incubator-systemml,sandeep-n/incubator-systemml,nakul02/systemml,dusenberrymw/incubator-systemml,niketanpansare/incubator-systemml,niketanpansare/systemml,nakul02/systemml,nakul02/incubator-systemml,dhutchis/systemml,deroneriksson/systemml,dhutchis/systemml,dusenberrymw/systemml,gweidner/incubator-systemml,gweidner/incubator-systemml,apache/incubator-systemml,asurve/systemml,dusenberrymw/incubator-systemml,nakul02/systemml,niketanpansare/incubator-systemml,deroneriksson/systemml,apache/incubator-systemml