Change state layout in VM so the stack starts at state[0] and grows
upwards.  Locals are at the top end of the state and number downwards.
This cleans up a lot of the interface connecting the VM to C: now all
functions that take an array of Micro Python objects are in order (ie no
longer in reverse).

Also clean up C API with keyword arguments (call_n and call_n_kw
replaced with single call method that takes keyword arguments).  And now
make_new takes keyword arguments.

emitnative.c has not yet been changed to comply with the new order of
stack layout.

Python long int implementation using C long long

Improve compatibility of examples with CPython (+ interp compatibility too)

Implicit "micropython" module contains (at least) codegeneration decorators.
Make it explicit, so an app could have "import micropython". On MicroPython,
that will be no-op. On CPython, that will give a chance to have a module
with placeholder decorators.

Delay between frames; run more generations.

Per Python3 io module semantics.

That at least makes stuff like "{:x}".format(1) to produce not completely
broken output.

Conflicts:
	py/objint.c
	unix-cpy/Makefile
	unix/Makefile

Conflicts:
	tests/basics/tests/exception1.py

Added some checks for number of arguments.

Conflicts:
	py/mpqstrraw.h

Parser no longer prints an error, but instead returns an exception ID
and message.

made DEBUG control CFLAGS in Makefiles other than stm as well.

Thanks to Dave Hylands for this.

Add combined image to GitHub front page README.md

Add missing ADC driver

Generic implementation if stream readall() method, immediately reused in unix io.FileIO implementation

Move towards Python-compliant interface of exceptions