Merge branch 'master', remote-tracking branch 'origin'
conversion to layout widgets.
Merge branch 'master' into uibinder
converted DataPanelView to uibinder.
added totals back into the confusion matrix display.
renamed DoublePanelView to DoublePanelViewImpl
extracted DoublePanelPresenter interface
renamed PanelView interface to DoublePanelView
uibinder for DoublePanelViewImpl