Minor alteration to Viewer co-ordinate/distance tools

These work well, would suggest the following minor change:
Only output "POINT:" information to the console when the user actually clicks.

Rationale: It's hard to copy the desired information out of the console as new 
outputs are constantly generated as you move the mouse across the model to get 
to the console window.  Also means you can stack up a whole list of dimensions 
in the console easily just by repeated picking.

Original issue reported on code.google.com by steve.br...@atkinsglobal.com on 3 Jun 2011 at 2:22

KonstantinosKr / solfec

Minor alteration to Viewer co-ordinate/distance tools #19