new video streaming process

[ian-whitestone]

The current streaming process works by killing the pycam.py process, and launching a uv4l process.

It would be great to control this via Flask, and not have to kill and launch a new process: See these links:

• https://stackoverflow.com/questions/20205358/how-do-i-stream-an-opencv-video-to-an-html-webpage
• http://answers.opencv.org/question/28671/how-to-stream-live-video-on-html-page-web-server/
• http://www.chioka.in/python-live-video-streaming-example/

[ian-whitestone]

tutorial: https://github.com/miguelgrinberg/flask-video-streaming