renames irssi file and adds rcrc
	renamed:    .irssi/config -> irssi/config
	renamed:    .irssi/default.theme -> irssi/default.theme
	renamed:    .irssi/elite.theme -> irssi/elite.theme
	renamed:    .irssi/xchat.theme -> irssi/xchat.theme
	new file:   rcrc
adds Brewfile for rcm installation
	new file:   Brewfile
tweaks
	modified:   irssi/config
	modified:   osx