1.4.0

• Added user-defined cameras
• Added boolean constants and operators
• Added comparison operators (greater than, equals, etc)
• Added if/else statements
• Added assert command
• Improved suggestions for mistyped operators
• Replaced range expression with separate to and step operators
• Failure to load an external model now displays an error instead of failing silently
• Added distinct error type for invalid text escape sequences
• Simplified identifier expression representation
• Converted option keyword to contextual keyword
• Added Geometry.worldTransform property