Rule of thumb is: any Python file that is greater than 100kb
(or adds a dependency with which it adds more than 100 kb)
should be a pretty useful/commonly used lib to stay in `python-light`.
An example, is the Python IO lib, which summarized (Python source +
binary module) is over 200kb.

Also moved some files that should have been put into previously
existing packages before, and re-organized the packages a bit.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>