Python update 5

Fix builds. 
https://github.com/openwrt/packages/issues/518 & http://buildbot.openwrt.org:8010/broken_packages/ar71xx.mikrotik/python/compile.txt

Making python ==> python-base and python-full ==> python.
This is the final packaging/switch/etc.
Users that want to install Python should install the standard python installation (out-of-the-box).
If they cannot fit the full Python install, they should use `python-base` and install whatever libs they need.
I have a work-in-progress for that and will also setup some examples with some other libs.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>