Simplify Java Update user experience while reducing update download

Currently, our java update process is more complicated than it needs to be. The jupdate.exe will first notify the user that it is ready to download the jre-iftw.exe. Then when the user agrees, it will notify that it is ready to install. We can simplify this further.

We should remove the downloading of the jre-iftw.exe from java update, which will save about 215KB on the update download. We should launch msiexec.exe directly from jupdate.exe when the msi file for the next update release is available. We can now remove the dialog that says that java update is ready to download files. We can instead just say something like "Java Update has not downloaded anything yet, but it is ready to install and update available from java.sun.com."

See the following doc for more info:

http://j2se.east/~billyh/simplified_jupdate/simplifyjupdate.html

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