* implement Locals as just a shallow copy of os.environ, even if it's not used.
* way more ideas.
+ bash expansion lands as a builtin.
+ std{in,out,err} point to the buffers of sys.foo.
* shuffling those ideas.
* in py3 we have to pull from functools.
- _io was never used (excep for some code that lasted only 5m until we replaced it for something simpler :).
+ note about builting eclipsing executables.
+ std{in,out,err} as builtin vars.