missing files for minizinc challenge

tools/CLASSES.fz

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+FD Search
+Free Search
+Parallel Search
+Open Class
+

tools/DESCRIPTION.fz

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+OR-Tools Flatzinc interpreter.
+
+See or-tools: https://developers.google.com/optimization/
+
+OR-Tools is a set Operations Research tools developed internally at Google and open-sourced.
+
+The project contains multiple tools:
+
+ - A Constraint Programming solver
+ - A Linear Programming solver
+ - A SAT solver
+ - A flatzinc interpreter on top of the Constraint Programming solver
+ - A wrapper around third party linear solvers (GLPK. CLP, CBC, SCIP, Gurobi, CPLEX)
+ - Knapsack algorithms
+ - Graph symmetry algorithms
+ - Graph algorithms (shortest paths, min cost flow, max flow, linear sum assignment)
+ - Python, Java, and .NET interfaces on top of the C++ libraries.
+
+It was build by the Operations Research team at Google.