Added org.dawnsci.mx.ui dependency for inheriting its editor.
Inheriting MXPlotImageEditor, thus the duplicated code is deleted from
dViewer's ImageEditor.
Bugfix: PSFTool caused exception when disposing ImageEditor.
Added logError method for easier debugging.
Added IPartListener to ImageEditor to be able to activate/deactivate the
augmenter. This solution is not compatible with existing solution where
the DiffractionTool is activating/deactivating the augmenter, however it
works when using same ImageEditors.
Merge branch 'master' of git@github.com:DawnScience/embl-cca.git

Conflicts:
	org.embl.cca.dviewer/src/org/embl/cca/dviewer/ui/editors/ImageEditor.java