unix: Update comment in gccollect.c
py: Revert some inline functions back to macros, since they bloat stmhal.
Revert "makeqstrdata.py: Add support for conditionally defined qstrs."

This reverts commit acb133d1b1a68847bd85c545312c3e221a6f7c0b.

Conditionals will be suported using C preprocessor.
py: Preprocess qstrdefs.h before feeding to makeqstrdata.py.

This is alternative implementation of supporting conditionals in qstrdefs.h,
hard to say if it's much cleaner than munging #ifdef's in Python code...
builtinimport: Elaborate debug output support.
builtinimport: Set __path__ attribute on packages.

Per https://docs.python.org/3.3/reference/import.html , this is the way to
tell module from package: "Specifically, any module that contains a __path__
attribute is considered a package." And it for sure will be needed to
implement relative imports.
py: Implement "from pkg import mod" variant of import.
showbc: Dump LOAD_NULL.
showbs: Dump LOAD_CONST_BYTES.
py, compiler: Fix compiling of keyword args following named star.
Merge branch 'master' of github.com:micropython/micropython
py, compiler: Fix up creation of default positionals tuple.

With new order of evaluation of defaults, creating the tuple was done in
the wrong spot.
py: Change inline to static inline for 2 functions.
py: Remove useless implementations of NOT_EQUAL in binary_op's.

I'm pretty sure these are never reached, since NOT_EQUAL is always
converted into EQUAL in mp_binary_op.  No one should call
type.binary_op directly, they should always go through mp_binary_op
(or mp_obj_is_equal).
Merge pull request #465 from xbe/unix-gc

unix: Fix GC not tracing .data
stmhal: Move I2C objects to ROM.
stmhal: Move fatfs volume/partition lookup table to ROM.
builtinimport: Fix thinko passing 0 vs NULL.
builtinimport: Set __path__ attribute ASAP as it's clear we have a package.

This helps with handling "recursive" imports in sane manner, for example
when foo/__init__.py has something like "from foo import submod".
py: Make ImportError message match CPython's.