Change iced.bare default to false to prevent leaking

Mimosa had the default bare setting for iced files as true. However, false might be a more sensible default. The reason for this is that when using Iced Coffeescript with RequireJS, a lot of iced code is added to the compiled file before the define call. This causes all of that code to leak into the global namespace. Therefore, it seems like a best practice to always wrap iced modules.