update README.md
update README.md

latest updates include:
- References section that explains the sources I used to create the `videoStitching.cpp` file.
- It also points out how `imageStitching.cpp` was taken directly from OpenCV's Github Repository as a way to learn image stitching an arbitrary number of images. The goal I am currently working on is to modify the `imageStitching.cpp` code to support videoStitching video files together. The user will receive a new video file of a panorama video they can for later.
SahSih/ARStreaming360Display,SahSih/ARStreaming360Display,SahSih/ARStreaming360Display,SahSih/ARStreaming360Display,SahSih/ARStreaming360Display