Tutorial

- Moved menu bar below canvas, and separated canvas out into its own view.
- Implemented a toolbox and temporarily moved the sprite table into the toolbox.
    - Added FXBlurView to the Podfile.
- Modified JSON to fit in bounds of new canvas
- Started implementing a tutorial that currently works on the canvas when a project is newly created.
- Added an icon image to the project.
- Added support for viewing trait code.
- Removed the accessory icon from the trait editor view controller and replaced with a button.