** Added a new method for variables, called `lvalue` which returns a new variable of the same type, but with a value that points to the original variable. This feature can be used for returning lvalues from functions or methods.
** Added a new method for variables, called `lvalue` which returns a new variable of the same type, but with a value that points to the original variable. This feature can be used for returning lvalues from functions or methods.

Example:
	var x = 10;
	func test { x.lvalue };
	test() += 10;
	say x;          # x is now 20

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