Add the standard license header.

Author: dourouc05

examples/cutting_stock_column_generation.jl

@@ -1,3 +1,13 @@
+#  Copyright 2019, Iain Dunning, Joey Huchette, Miles Lubin, and contributors
+#  This Source Code Form is subject to the terms of the Mozilla Public
+#  License, v. 2.0. If a copy of the MPL was not distributed with this
+#  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#############################################################################
+# JuMP
+# An algebraic modeling language for Julia
+# See http://github.com/JuliaOpt/JuMP.jl
+#############################################################################
+
 # Based on http://doi.org/10.5281/zenodo.3329388
 
 using JuMP, GLPK, SparseArrays, Test