#191 better suggestions for file locations

[Lee Worden]

Nobody really wants each file 'xyz' to be on its own page 'Main Page/xyz'. ManageProject and ImportProjectFiles should stop trying to put them there by default. The default location should be the main page for the project, because that's where people are most likely to want it. Maybe Image:Projectname$Filename is still good though. It would be great if there was a way to make it switch between the "text default" and "image default" while importing. Also, the default suggestions code might just be completely breaking and doing nothing some of the time, but I'm not sure.