Footprint naming and placement of second reference designator not ideal in OptoDevice lib
Examples for badly placed second references:
![screenshot from 2017-11-28 10-10-47](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
Naming convention is a bit harder. We need to find a system for part prefixes that would group similar devices together