added lirc_rpi section to udev.d/98_lircd.rules
added lirc_rpi lirc config file with mce, macmini and xbox remote mappings.
install lircd.conf.rpi
Merge pull request #2090 from jenkins101/lirc_rpi

lircd: added autoconfiguration of lirc_rpi for mce, macmini and xbox remotes.