MiRCARTCanvas.py:MiRCARTCanvas.resize(): call SetMinSize() in addition to SetSize().
MiRCARTCanvas.py:MiRCARTCanvas.resize(): call Layout() on canvas panel window and its parents.
MiRCARTCanvasInterface.py: always call SetCursor() w/ self.parentCanvas.
MiRCARTFrame.py: moves colour toolbar items to separate toolbar.
MiRCARTFrame.py:MiRCARTFrame.__init__(): add canvas panel to and initialise sizer.
MiRCARTGeneralFrame.py: adds support for multiple toolbars via vertical box sizer.