Updated README.md, fixed merge sort, added checking output with bash script, and added sort arguments

Makefile

@@ -1,13 +1,18 @@
 INC := -I include
+STD := -std=c++11
 
 main: compile link
 
 compile:
-	g++ $(INC) -c -o build/main.o src/main.cpp
-	g++ $(INC) -c -o build/sorts.o src/sorts.cpp
+	g++ $(INC) $(STD) -c -o build/main.o src/main.cpp
+	g++ $(INC) $(STD) -c -o build/sorts.o src/sorts.cpp
 
 link:
 	g++ -o bin/main.out build/*.o
 
+test: main
+	bin/main.out -a > test/SortTimes.txt
+	test/CheckSortedOutputs.sh
+
 clean:
 	rm build/*.o bin/*.out test/OUTPUT/*.txt