Changed `isoblued` threading again.
Fixed bug with mutex in `ring_buf`.

Threads killed holding the mutex did not release it.
Added automatic build numbers for Makefiles.

`isoblued` and the ISOBUS module currently use it.
Minor change to Bluetooth protocol.

Should make parsing on Android better.
Added option for size of `isoblued` buffer.
Merge pull request #8 from awlayton/master

More reliable version of isoblued