Add enigma2-lirc-input support

All remotes in lircd.conf with "E2_" - name-prefix will automatically be used by enigma2, incl. repeated signals etc.
LIRCD needs to be up when starting up enigma2, enigma2-lirc-support uses default lircd-socket-path (/var/run/lirc/lircd) to read in rc events from lirc.
Status : working completely, todo : lirc-init-script / e2-plugin.
New remotes have to be added via irrecord at console currently.