pyusb: Add MicroPython implementation of PyUSB library.

Signed-off-by: Damien George <damien@micropython.org>

aiohttp: Add new aiohttp package.

Implement `aiohttp` with `ClientSession`, websockets and `SSLContext`
support.

Only client is implemented and API is mostly compatible with CPython
`aiohttp`.

Signed-off-by: Carlos Gil <carlosgilglez@gmail.com>

aiohttp: Add new aiohttp package.

Implement `aiohttp` with `ClientSession`, websockets and `SSLContext`
support.

Only client is implemented and API is mostly compatible with CPython
`aiohttp`.

Signed-off-by: Carlos Gil <carlosgilglez@gmail.com>

aiohttp: Add new aiohttp package.

Implement `aiohttp` with `ClientSession`, websockets and `SSLContext`
support.

Only client is implemented and API is mostly compatible with CPython
`aiohttp`.

Signed-off-by: Carlos Gil <carlosgilglez@gmail.com>

requests: Fix detection of iterators in chunked data requests.

Chunked detection does not work as generators never have an `__iter__`
attribute.  They do have `__next__`.

Example that now works with this commit:

    def read_in_chunks(file_object, chunk_size=4096):
        while True:
            data = file_object.read(chunk_size)
            if not data:
                break
            yield data

    file = open(filename, "rb")
    r = requests.post(url, data=read_in_chunks(file))

aioble: Fix descriptor flag handling.

Removes the workaround for micropython/issues/6864.

Sets the default flags for discovered descriptors to be WRITE,
so that d.write() will implicitly set response=True.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

threading: Release 0.1.

uasyncio: Release 1.2.

machine: Release 0.2.1.

optimize_upip.py: Script to optimize archives for low-heap upip usage.