Most requested libraries

[davidpcahill]

Hoping to start a thread of the most requested libraries/modules for micropython that we wish were available today. I'll give my list:

• (u)requests.iter_content to allow streaming / chunking data from sources (like http) to avoid memory limit issues.
• re (add re.IGNORECASE, re.escape, re.sub, etc.)
• html
• xmltodict or some other popular xml parsing library (though at least we have a json option, so many sources are still in xml unfortunately)

[davidpcahill]

One existing reference to add at least iter_content, with a merge request is micropython/micropython-lib#278