Hostname instead of IP in several actors, naming OSC actors

[DillTheKraut]

I would appreciate if one could put host names into the value fields where there is asked for IP addresses as an option.

Reasons: 

DHCP driven Networks with alot of Hosts (I'm working on a System with up to 25 Raspberry PIs), More easy to separate groups by Names, like with prefixes. Or just because of shorter and more memorable and meaningful naming making it easier for working dynamically with several hosts.
And for the future much easier IP6 handling.

dill