merges the two ILPSolver interfaces (in this package and the one in LBJava)
merging the two gurobi solvers: for most of the syntax I have used that of LBJava's.
If this get's merged, we can remove IlpSolver.java, GurobiHook.java and oJAlgoHook.java from lbjava and add this illinios-inference as LBJava's dependency.
