Write metadata to container (and maybe streams)
Frame.index from AVCodecContext on decode
Meta
Quick VideoFrame.from_image and .from_ndarray

They could be MUCH better.
Example of encoding a frame sequence
Remove old examples
Restructure for setuptools

I could not get source files in build to get
picked up by the MANIFEST.in, so I moved them.
Container.add_stream accepts rational frame rate
VideoFrame.from_ndarray allows explicit mode
Release v0.1.0

FIRST PUBLIC RELEASE!