Support for Final Cut Pro X v10.3

Subvert is now compatible with Final Cut Pro X version 10.3. This new version of Subvert (v0.6.3) removes support for FCPXML version 1.5 and is only compatible with FCPX 10.3. If you’re on the beta and using FCPX 10.3, please update to Subvert using the “Check for Updates…” command in the menu.