[MINOR] Added common errors and troubleshooting tricks
[MINOR] Added common errors and troubleshooting tricks

Closes #428.

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