Made it possible to show and hide the grid in 3d gcode view.
Made the post load processing on gcode files happen in a background thread so as not to lock up the ui.
Merge remote-tracking branch 'Greg/development' into development
Moved RootedObject Event to agg (rather than agg gui)
Merge remote-tracking branch 'Greg/development' into development
Enabled outline view
Adde use_opengl to release builds.
Moved progress control to agg.
Making sure we free memory.
Put in some code to find performance issues.
Got rid of dead code.
Hide the progress bar when done loading.