Revert "Added gitignore to ignore outputs"

This reverts commit f494646a5aaf2a5fd0ca8c57bff9cdbbd5103871.
Revert "Revert "Added gitignore to ignore outputs""

This reverts commit d416b976079ac73e6d05b4b90c1f4bae4b2648a9.
Don't touch mah code satoshi