Updated gitignore

This will stop all the built code from appearing in your repository.
Merge pull request #1 from DunNZ/patch-1

Updated gitignore
Merge pull request #2 from DunNZ/master

Some more helping code for you
Space Invader
Merge pull request #1 from JoshuaKozminska/master

test, Josh please ignore this if it shows up for you