Added support for Pilight 5.0 Nightly

This adds support for the Nightly-Version of Pilight.
Also adds support for "elro_he_switch" - protocol. Not tested with "oldVersion"

Tested with:
   pilight-daemon version 5.0, commit v5.0-110-g807170e
   version $Id: fhem.pl 6913 2014-11-08 10:32:44Z rudolfkoenig $

Perhaps it would be useful to add another switch for the new version.