Update Kext Wizard to new download location

Kext Wizard is no longer served from a Dropbox location but now has a website. For whatever reason, the project "homepage" is still the forum thread:

http://www.osxlatitude.com/ -> Projects -> Kext Wizard points to the thread, so that's what I left it as. Let me know if you think I should change to osxlatititude on its own.