Add '.gitignore'.

Adds '.gitignore' with rules from 'https://github.com/github/gitignore/blob/master/Python.gitignore'.

Signed-off-by: Harley Waldstein <hwaldstein1997@gmail.com>
Add 'db.sqlite3'.

Adds database file from default installation. I'm not sure if it's best practice to have this is Git, but it's better to be safe and have it than sorry and not have it.

Signed-off-by: Harley Waldstein <hwaldstein1997@gmail.com>