Installer/darwin: mark the entire javascript as CDATA, avoids trouble with xml parsers looking at the complicated contents (which otherwise would need to use character entities), plus another message wording change

Installer/darwin: remove incorrect apostrophe

Installer/darwin: kill idle VBoxSVC instances which may exist due to a bug in the previously installed version, plus a minor wording change for the messages

Mac OS X installer: fixed typo.

Replaced VBoxStartupItems with a launch script and plist located in the VBoxKEXTs pacakge. To provide a script for loading, loading and reloading drivers manually, I modified the existing startup item script instead of cleanup up the intendation of the proposed vbox kext keeper script.

Installer/darwin: Require 10.6 or later.

export darwin installer to OSE