Adding classic Makefiles in all directories. Valgrind test for Boolean OK.
Updating LinkedList. Valgrind OK. Updating Boolean. Valgrind OK. Removing unnecessary files from directory. Updating Makefile.
Adding an executable to test linked list data-structure.
Updating LinkedList (2). Valgrind OK.
Updating Stack. Valgrind OK.
Adding Queue data-structure. Valgrind OK. Small modifications in Stack