Changes to settings

[GoogleCodeExporter]

- Add "tracking mode" to settings:

"Contours": CONTOUR
"Contours with outlines": CONTOUR | OUTLINE
"Contours with all peaks": CONTOUR | OUTLINE | PEAK_OUTER
"Contours with inner peaks": CONTOUR | OUTLINE | PEAK_INNER
"Contours with outer peaks": CONTOUR | OUTLINE | PEAK_OUTER
"Inner peaks": PEAK_INNER
"Outer peaks": PEAK_OUTER
"Peaks": PEAK_INNER | PEAK_OUTER
"Optical flow": OPTICAL_FLOW
"Skeleton": SKELETON

- Remove "skeletonization" and "track inner peaks" from settings (redundant 
after above change)

- Allow "threshold" to go to -1, which will turn on (and read) "adaptive" 
threshold mode

Original issue reported on code.google.com by banthere...@gmail.com on 8 Nov 2010 at 7:59

[GoogleCodeExporter]

- Add "optical flow max points"

- Reorganize settings by category
    Image: Amplify
    Image: Smoothing
    Contour: Smoothing
    Contour: Min size
    Contour: Max size
    Device: ID
    Device: Flip horizontal
    Device: Flip vertical

etc

Original comment by banthere...@gmail.com on 8 Nov 2010 at 8:02

[GoogleCodeExporter]

Also, settings constants should be moved to enum.

Original comment by banthere...@gmail.com on 8 Nov 2010 at 8:11