Added interfaces for downsampling.
Made changes to colours.
Added new method to AbstractPlottingSystem for cursor setting.
Added cross to drawing of cursor icon.
Added methods for using draw2d based mouse listeners with an @deprecated
so that people know they are not for general use.
Merge branch 'master' of git@github.com:DawnScience/dawn-common.git

Conflicts:
	org.dawb.common.ui/src/org/dawb/common/ui/plot/AbstractPlottingSystem.java
Added regionCancelled(...) required by Ravi.
Merge branch 'master' of git@github.com:DawnScience/dawn-common.git