Couse: Programming Technique - COSC2451
Assignment: 1 - Make a map editor for game pacman
Student 1: Nguyen Vinh Linh - s3410595
Student 2: Doan Hai Dang - s3425475

extra commands:
:ca change author information including name and his email
:cm change map information
 
References:
1. "Compiler error: warning: implicit declaration of function 'strdup'", http://cboard.cprogramming.com/c-programming/95462-compiler-error-warning-implicit-declaration-function-%27strdup%27.html