Without .dist-info (similar to .egg-info), setuptools and pip are not
discoverable by pkg_resources.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

A suggestion from comment (from Philip Prindeville):
https://github.com/openwrt/packages/issues/4529#issuecomment-312518121

Avoids some escaping of slashes.

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

python3-pip & python3-setuptools have slightly
different installation mechanisms.

We need to remove the __pycache__ folders.
Seems they're generated.

This also reduces the size of the python3-pip &
python3-setuptools packages.

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

I admit this may be be a bit aggressive, but the lang
folder is getting cluttered/filled up with Python, PHP, Perl,
Ruby, etc. packages.

Makes sense to try to group them into per-lang folders.

I took the Pythons.

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

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

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