Renamed "Lab 1" and "Lab 2" to "Lab1" and "Lab2" respectively.

This was done simply to make navigation in the command line easier. No other
major changes were done this commit.
Adding Lab3 sample code to the repo.

I double checked with Dr. Leung and he said that it was fine for me to use
GitHub to track everything so I no longer am worried about putting this code in
my repo for tracking and forcing myself into bettur coding and versioning
habits.