[Kst] branches/work/kst/portto4/kst/src/libkstapp

[Adam Treat]

SVN commit 723834 by treat:

* Add more zoom modes:
	YLocalMaximum
	XIn, XOut, YIn, YOut
* Refactor how we compute the projection rects


 M  +225 -128  plotrenderitem.cpp  
 M  +55 -2     plotrenderitem.h