Console pops up when running Update.exe with no arguments

[caesay]

Update.exe is a GUI application, but if run without arguments will attempt to attach a console (which causes a console window to appear briefly).

Users can get confused and click Update.exe believing it is the primary application (and nothing will happen but a quick console flash).

If Update.exe is run without arguments, we should probably try to launch the main app if there is only one squirrel aware binary (which is the most common case).

Side note: we should exclude createdump.exe from getting stubs generated.