modified:   examples/parallel_chi.py
first add. Runs all videos in a dir
Merge branch 'master' of https://github.com/drdangersimon/image_diff
fixed bug with missmached arrays
	modified:   base.py
	modified:   reduced_chi.py
Merge branch 'master' of https://github.com/drdangersimon/image_diff
minor bug fixes. Addin changepoint analysis
Got chaingepoint program to work
Merge branch 'master' of https://github.com/drdangersimon/image_diff
Thuso's Changes