Add support for Xcode 6.

Instruments calls devices by a different name now (it prefers actual device names). Add support for these names.

Updates the instruments build number, and handles 'instruments -s' failing
to tell us the path to Automation.tracetemplate.

Also pulled in the new version of instruments-without-delay.
Add new devices (in format of Xcode 6) and auto-conversion of DeviceVariations.