Added some code for verbose plugin manager output. This is what you should get when loading "cube" and then calling the regular "print" function.
Fl_Plugin: creating a plugin, class "fltk:device", name "opengl.device.fltk.org"
Fl_Plugin: creating a plugin manager for class "fltk:device"
Fl_Plugin: adding plugin named "opengl.device.fltk.org" at 0x0x175314
Fl_Plugin: deleting a plugin manager
Fl_Plugin: creating a plugin manager for class "fltk:device"
Fl_Plugin: returning plugin named "opengl.device.fltk.org": 0x0x175314
Fl_Plugin: deleting a plugin manager
Fl_Plugin: deleting a plugin
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7291 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
