Improve idempotency.  Don't do apt-get twice in 12 hours.
 Changes to be committed:
	modified:   ipoerpAptDependencies.sh
Nore idempotency fixes
 Changes to be committed:
	modified:   MountPortableOpenERP.sh
	modified:   ipoerpMountSiteVolume.sh
	modified:   iredmailInstallAll.sh