D.eval source code(modified)

Changes

• Added support for importing package level functions like flash.net.navigateToURL
• Changed error message to print stack trace instead of just the error
• Fixed the problem with variable scopes so that statements like var x:int; can be used to define variables in the local scope
• Added support for ...rest parameter in function definition
• Added support for try...catch...finally statements
• Added the option to use import statements like import flash.net.*;
• Changed FunctionDef objects to functions, i.e. any function defined in the code will point to a Function object at runtime, not a FunctionDef object
• Added support for classes