Änderungen

Improve Lua optimizers (#1063)

* Improve Lua optimizers

* Improve constant tuple propagation

* Fix stacktraces

* Only eliminate simple types

Class types are required when evaluating the type of member accesses.

* Fix for copies of tuples and simplify code

Knowledge may also contain copies of tuples. They cannot be updated by tuple selection assignments and have to be removed instead.
 (commit: db253e0)