Add new port comms/telldus-core

PR: 189221
Submitted by: johan (stromnet.se)

Allows access to Telldus Tellstick USB dongles for communicating with
433MHz devices in your home.

Provides "telldusd", the daemon which keeps track of your tellstick
devices. Through a UNIX socket, the sensors and devices can be used/
controlled from the command line tool "tdtool", or via the libtelldus-core
C client library.