Improve error messages from xcfg loading

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Improve debug from T68

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Zero T68 array at start of process

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Fix bug with T68 command handling

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Add man page to ignore file

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Use poll for message wait loop

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Read T68 datatype from file

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Implement multi-device support

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>