Dev/streaming act

[as6520]

• Added support for rtsp stream
• For video source placeholder frame rate is replaced with frame rate obtained from video reader
• Refactored processes and pipelines based on the algorithm they are associated with
• Added process for gpu based optical flow
• The algorithm pipelines follow consistent naming pattern with algorithm name representing local pipeline and zmq suffix representing zmq based pipeline
• All zmq pipeline use image sender process to read images/videos from VIRAT
• Added addtional bash scripts for both baselines algorithms that allows baseline algorithm to run over the dataset and produce individual json files

[aaron-bray]

LGTM!