Otherwise, some generator statements still may be spuriously executed on
subsequent calls to next()/send().

Implement send() method for generators.

unix Makefile: -Og doesn't work (at least) with gcc 4.6 below.

-147 bytes on x86.

Also, don't try to force debug info format, use native.

Fixed dependency problem for qstrdefs.generated.h

The problem manifests itself in make 4.0

I also fixed the LINK message when linking the final executable for unix and unix-cpy.

To partly address Issue #220.

Addresses Issue #203.

TODO: Check lexer/parse/compile error path for leaks too.

mp_map_deinit() finalizes static map, mp_map_free() - dynamic.

Add basic implementation of bytes type, piggybacking on str.

Rework makefiles. Add proper dependency checking.

This reverts commit a215b09c.

Move file obj to separate module

There can be multiple emitters allocated during compile (eg byte code
and native).

Add support for freeing code emitter objects at the end of compilation.

Update conwaylife.py

Want common qstrs to be first in the list so they have the lowest ids,
so that in the byte code they take up the least room.

Allow qstr's with non-ident chars, construct good identifier for them.