add lpsolve spkg #8661
Description
See http://www.math.unl.edu/~shartke2/files/ for the spkg.
See http://groups.google.com/group/sage-devel/browse_frm/thread/94f30bf9a589d88e/fc9f4e7b63836151 for previous discussion.
CC: @wdjoyner @sagetrac-hartke @nathanncohen @dimpase
Component: packages: optional
Issue created by migration from https://trac.sagemath.org/ticket/8661