Added general random sparse matrix generation
Added general random sparse matrix generation

phlip9/BIDMat,codeaudit/BIDMat,codeaudit/BIDMat,phlip9/BIDMat,phlip9/BIDMat,phlip9/BIDMat,phlip9/BIDMat,codeaudit/BIDMat,codeaudit/BIDMat,codeaudit/BIDMat