Anubis / Anubis

…aybe(ByteArray). ReadResult introduce timeout error handling.

I'm not sure I did not forget something.

Updated the primitive 'set_environment_variable', which was not implemented.

conditionals. This is not yet finished. The library has been changed accordingly.
There is a new constraint in the compiler: any two alternatives of the same type
cannot have the same name and the same arity.