changed Simpl; added some TODO's for reading and decisions.
not sure if compiles, but next commit with start of HJS->Simpl will follow soon.
main issues:
- removed unary operators
- what do we do with a ternary operator?
- added distinction between strict and weak equality
- do we want to do bitwise operators? added implementation.

Signed-off-by: Pepijn Kokke <pepijn.kokke@gmail.com>