Dobrica Pavlinušić's random unstructured stuff

Rigol: Revision 1

* http://www.gotroot.ca/rigol/
* https://github.com/RoGeorge/DS1054Z_screen_capture
* https://github.com/rheslip/PyDSA
* https://github.com/wd5gnr/qrigol
* https://github.com/pklaus/ds1054z