[Jackaudio] Jack Copilot : JackPilot revival on macOS 64 bits systems

[BAVU Eric]

Hi all,

I just pushed to the repository an update of Jack Copilot with some minor (but needed) improvements : 

- check at startup is jackdmp is installed where expected (at /usr/local/bin/jackdmp)
- check at startup if jackdmp is already running
- check after launch if all went well

If you cloned an hour ago with the 1.2 version, please update to 1.2.1 version (i left a bug with my tests on jackdmp executable). It’s fixed in 1.2.1 version available both with sources and dmg installer.

Best Regards,