R-Programming Course - Assignment 2 - Peer evaluation
 - Two R functions developed (makeCacheMatrix and CacheSolve)
 - Saved in local R-file cachematrix.R (in repo ProgrammingAssignment2
   initially forked from GitHub)
 - Git Bash commands used:
   1) git status (to see what happened in local repo to cachematrix.R
   2) git add cachematix.R (to index the modified cachematrix file)
   3) git commit (to write this commit)
   4) git push origin master (to push my local changes to my online repo)