Automate build

Import makefile that can be used by GNU/Make. Invoke from a shell with `make`.

.gitignore

@@ -37,3 +37,4 @@
 
 # End of https://www.toptal.com/developers/gitignore/api/c++
 
+bin/

makefile

@@ -0,0 +1,25 @@
+CXX=g++
+CXXFLAGS=-std=c++14
+LDFLAGS=-lSDL -lSDL_gfx
+INC=
+LIB=
+
+EXEC=BiomeBox
+SRC=$(shell find . -name '*.cpp') 
+OBJ=$(SRC:.cpp=.o)
+
+$(EXEC): $(OBJ)
+	@mkdir -p bin
+	$(CXX) -o bin/$@ $^ $(LDFLAGS) $(LIB)
+
+%.o : %.cpp 
+	$(CXX) -o $@ -c $< $(CXXFLAGS) $(INC)
+	
+clean:
+	rm -rf $(OBJ)
+
+distclean: clean
+	rm -rf ./bin
+
+exec: $(EXEC)
+	./bin/$(EXEC)