- FunctionElement subclasses are now directly executable the

- FunctionElement subclasses are now directly executable the
same way any func.foo() construct is, with automatic
SELECT being applied when passed to execute().

- The "type" and "bind" keyword arguments of a func.foo()
construct are now local to "func." constructs and are
not part of the FunctionElement base class, allowing
a "type" to be handled in a custom constructor or
class-level variable.