plotPeppers plots the peduncle position.
Teh demo code.
Added so that the demo script plots gt and meashure separately (also).
Merge branch 'demoLinusMartinJakob' of https://github.com/niclasborlin/pick2014 into demoLinusMartinJakob
Fixed peduncle positions.
merge with demoLinusMartinJakob