Libraries v2.9 released + other updates

[paulsoulsby]

Here's the other updates:
* Libraries v2.9 is released and on Github: https://github.com/soulsbysynths/libraries This is for Arduino 1.8.5 (and Atmel 7 + Visual Micro should you desire!)
* miniAtmegatron and miniOdytron now have CC 7 for volume added to latest version
* miniAtmegatron and miniOdytron now have separate versions for issue 2 and 3 kits.  Unfortunately the issue 3 kits have different LED pinouts which require different software. You can see your issue number below the value inc button on the pCB