Operator Overloading

The following operators should be overloadable, with the following names:

[]: __set and __get (as l-value and r-value)
**: __pow
+: __pos (unary), __add (binary)
-: __neg (unary), __sub (binary)
len: __len
^: __bnot (unary), __bxor (binary)
*: __mul
/: __div
//: __idiv
%: __mod
<<: __bshl
>>: __bshr
&: __band
&^: __bandnot
|: __bor
~: __concat

In the future, the following could also be overloaded:

(): __call
<: __lt
<=: __le
>: __gt
>=: __ge
==: __eq
!=: __ne