******************************************
   ATOM_SHELL short for Atom shell
******************************************

-I have used some of the list operators like '&&', '&', '||' and others -example: ls > file && cat < file OR ls && ls -l

-I have used built in functions like cd, help, exit, history, and umask
-Using _GNU_SOURCE and c99
-Might add more stuff later on.
-Enjoy!