Some Fountain files do not import correctly

[audionerd]

Some Fountain files (e.g.: the "Brick & Steel" example from fountain.io), after being tagged with scene ids, still appear to Storyboarder as not having scene ids. So the second time their opened, Storyboarder tries to add more scene ids.

This causes a scene id alert to show every time the script-based Storyboarder project is opened, even after it has been converted from .fountain.

• Fix line-endings parsing
• Ensure line endings aren't dropped