Just what it sounds like. For JMeter 2.13. Only adds JMeter itself to the path as a batch file... somewhat clumsy, but a start.
Thanks to @micking for the fix so an extra cmd.exe doesn't start.
For some reason, when JMeter upgrades, the old versions go offline from their mirrors. If anyone wants to figure out a better way to maintain this, feel free to fork and take over.