Merge pull request #3 from gregurton/master

Working scoring mechanism. Removed superfluous comments.
Merge pull request #4 from gregurton/master

Functional basic game that will play again or exit
Merge pull request #5 from gregurton/master

Game currently doesn't end at you win. Keeps asking for more guesses.
Merge pull request #6 from gregurton/master

Can't guess same number twice or number that computer picked. Game curre...
Merge pull request #7 from gregurton/master

Game restarts after win (good), but puts welcome message again.
Merge pull request #8 from gregurton/master

Final version.