Update python's readme.me
Update python's readme.me

I've seen multiple pull requests that misread our warning and seem to think pyrealsense2 doesn't support SDK 2.0 due to confusion between pyrealsense v2.0 and pyrealsense2.
This pull request aims to make this warning less confusing
IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense