Optional: Move optional-lite to the include/third-party directory

This fixes the use case of adding the include folder
manually to an outside project.

include/icsneo/third-party/optional-lite/test/Makefile

@@ -0,0 +1,39 @@
+# Copyright 2014 by Martin Moene
+#
+# Distributed under the Boost Software License, Version 1.0. (See accompanying
+# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#
+# optional lite is inspired on std::optional by Fernando Cacciola and
+# Andrzej Krzemienski and on expected lite by Martin Moene.
+
+# Usage: gmake [STD=c++03]
+
+PROGRAM = optional-main.t
+SOURCES = $(wildcard *.cpp)
+OBJECTS = $(SOURCES:.cpp=.o)
+
+ifdef STD
+STD_OPTION = -std=$(STD)
+endif
+
+CXX = g++
+CXXFLAGS = $(STD_OPTION) -I../include -Wall  # -Wextra
+
+all: $(PROGRAM)
+
+$(PROGRAM): $(OBJECTS)
+	$(CXX) -o $@ $^
+
+test: $(PROGRAM)
+	./$(PROGRAM)
+
+test-all: $(PROGRAM)
+	./$(PROGRAM) @
+
+list: test
+	./$(PROGRAM) -l
+
+clean:
+	$(RM) $(OBJECTS)
+	$(RM) $(PROGRAM)
+