It's mine, mine, all mine, ha ha ha ...
First version of pure stack machine
Starting to enforce stack purity
Cleanup code for do/load/loadfile

Load/loadfile does not yet handle source/mode/env properly.
Change method call name to methodcall

There are now method and methodcall, similar to function and
functioncall.
Create framework for handling require and modules

For now it contains very little, but it will grow.
Fix dofile description
Improve block handling
Split operator functions in 2 parts, without then with meta functions

This allows an attempt at doing a faster call where we assume it will
work without first fixing stack in state which might not be used.
Stack was not properly fixed before.