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This allows to cut number of packages installed from 3rd-party package repos,
and otherwise cut number of overrides and hacks.

Seedable and reproducible pseudo-random number generator. Implemented
functions are getrandbits(n) (n <= 32) and seed().

The algorithm used is Yasmarang by Ilya Levin:
http://www.literatecode.com/yasmarang

This will help make sure new commits work with OBJ_REPR_D.

Build using: make nanbox

this allows python code to use property(lambda:..., doc=...) idiom.

named versions for the fget, fset and fdel arguments are left out in the
interest of saving space; they are rarely used and easy to enable when
actually needed.

a test case is included.

This is essentially a duplicate of obj_dict.py

Makes code easier to read and more maintainable.

The first argument to the type.make_new method is naturally a uPy type,
and all uses of this argument cast it directly to a pointer to a type
structure.  So it makes sense to just have it a pointer to a type from
the very beginning (and a const pointer at that).  This patch makes
such a change, and removes all unnecessary casting to/from mp_obj_t.

With this patch the n_args parameter is changed type from mp_uint_t to
size_t.

This patch changes the type signature of .make_new and .call object method
slots to use size_t for n_args and n_kw (was mp_uint_t.  Makes code more
efficient when mp_uint_t is larger than a machine word.  Doesn't affect
ports when size_t and mp_uint_t have the same size.

Instead of struct tm like structure, as required by CPython.

Replace hyphens with undescores in modules.

This allows a port to specify exactly how many bits are in a small
int (eg for a uPy bytecode cross compiler).

In some cases ssize_t is not defined by already included headers.

Need to record in .mpy file whether unicode is enabled, and how many bits
are in a small int.

Minimal support code for a Cortex-M CPU is added, along with set-up
code for an STM32F4xx MCU, including a UART for a REPL.  Tested on
a pyboard.  Code size is 77592 bytes.

They are no longer needed because stm constants can now be 32 bits wide.

Adds 924 bytes of code, but means that no more hacks and work-arounds are
needed due to large constants becoming negative.

movwt can now move a full 32-bit constant into a register.