Merge pull request #11 from ksoderstrom/master

Updated Info.plist to support Mail 7.3 1878.6 (OS X 10.9.4)
Using "defaults read" to get the UUID. This also works in Yosemite.
Add the latest Yosemite beta UUID
Merge pull request #14 from roderik/patch-1

Using "defaults read" to get the UUID. This also works in Yosemite.
Merge pull request #15 from roderik/patch-2

Add the latest Yosemite beta UUID
Add Yosemite Beta 7
Merge pull request #16 from roderik/patch-1

Add Yosemite Beta 7