Add setting to prevent certain folders from being copied to new project

When you have your own precious project template under version control, project_maker will copy the version control folders over to the new project.

This most recent commit in this pull request adds the setting ´non_copied´, which takes a list of blob style patterns that get ignored when the template files are being copied.
Maybe it would even make sense to have the patterns hard-coded, rather than settings-based?

(Sorry again for the pull request containing my other commits, next time I hope will be cleaner : )