added a zoom argument to set_dotcode and set_xdotcode to determine whether the view returns to center after dotcode generation
Added a second SIGNAL emit for when you click on a region that does not contain a node.  The payload of the signal is a string filled with the text "none".  This is useful as a de-select event.
added another callback for right click
Merge pull request #3 from futureneer/indigo-devel

Added a center argument to set_dotcode and set_xdotcode