The log viewer tool lets you inspect all the intermediate stages of the routing algorithms. This patch:
- Adds source location tracking of the debug calls (need to use the PNS_DBG macro, sorry)
- Moves some wxLogTrace calls to DEBUG_DECORATOR::Message() so that messages can be displayed alongside the corresponding geometric shapes
The use of printf, wxLogDebug, and std::err/std::out causes excessive
debugging output which makes finding specific debugging messages more
difficult than it needs to be.
There is still some debugging output in test code that really needs to
be moved into a unit test.
Add debugging output section to the coding policy regarding debugging
output.