Comments on extra_args

	modified:   positions.py
Remove initialization of `labels = None`

Not sure where this came from, but it should be OK without it...

	modified:   positions.py
Full normalization of image

This should be more uniform:
    im -= im.min()
    im /= im.max()

	modified:   positions.py
Add TODO

To do list for the project.

	new file:   TODO
have to have extention for outliner

	renamed:    TODO -> TODO.otl
vimoutliner-ify

	modified:   TODO.otl
Lots of additions, cleanup, added times.

	modified:   TODO.otl
TODO: use convolution/threshold for big dots too

	modified:   TODO.otl
TODO: Fix high speed camera

	modified:   TODO.otl
Merge branch 'subtraction' of /home/lawalsh/Git_Repos/Tracking

Conflicts:
	positions.py

Made to look like the version on rock.  Hadn't touched the version on
foppl (not origin) for a long time, so I just ignored its changes.

Used to run the corner finding and orientation tracking stuff on foppl
Merge branch 'subtraction' of /home/lawalsh/Git_Repos/Tracking into subtraction
Prep for orientation tracking of different shaking

To run tracks on foppl.  Added argparser, too.

	modified:   tracks.py
Merge branch 'subtraction' of /home/lawalsh/Git_Repos/Tracking into subtraction
Merge branch 'master' of foppl:/home/lawalsh/Git_Repos/Tracking into subtraction
Merge branch 'subtraction' of foppl:/home/lawalsh/Git_Repos/Tracking into subtraction
Fixed spelling of add_argument; print prefix

	modified:   tracks.py
Change permissions (a+x) for tracks

	modified:   tracks.py
Change permissions (a+x) for tracks

	modified:   tracks.py
Merge branch 'subtraction' of /home/lawalsh/Git_Repos/Tracking into subtraction
Update notebok, I guess.

	modified:   diffusion.ipynb