launchd plist to launch BitTorrent Sync and keep it running, even if it crashes

sync.com.tjluoma.bittorrentsync.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>KeepAlive</key>
	<dict>
		<key>Crashed</key>
		<true/>
		<key>SuccessfulExit</key>
		<false/>
	</dict>
	<key>Label</key>
	<string>sync.com.tjluoma.bittorrentsync</string>
	<key>ProgramArguments</key>
	<array>
		<string>/usr/bin/open</string>
		<string>-W</string>
		<string>-a</string>
		<string>BitTorrent Sync</string>
	</array>
	<key>RunAtLoad</key>
	<true/>
</dict>
</plist>

This doesn't work as intended, because it relies on /usr/bin/open to launch BitTorrent Sync. Because of that, launchd will only re-launch the app if /usr/bin/open returns error status when the app crashes. But it returns 0 in that case, so on an app crash, launchd still sees a successful exit. A working version would have to launch BitTorrent Sync directly so as to pick up its crash status. I uploaded one version of this at https://gist.github.com/atomicbird/ff2de46a594cdb5c8e69