It seems that this can become an issue.
Found when building python3-setuptools from packages/trunk
in openwrt/15.05.

python3-setuptools is not in packages/for-15.05

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

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>

Packetize some Python modules to reduce size of the overall Python package.
Basically, a new package is introduced, call `python-light`,
and everything that's extra (or big) is put in other packages.

The `python` package becomes a metapackage that installs `python-light`
along with the rest of the packages.

Base work started by Jan Čermák.

Signed-off-by: Jan Čermák <jan.cermak@nic.cz>
Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>