Added 'check_memory.rb' formatter.
Added 'check_memory.rb' formatter.

etsy/nagios-herald,etsy/nagios-herald,BinLee/nagios-herald,BinLee/nagios-herald,kenzophuong/nagios-herald-1,kenzophuong/nagios-herald-1,BinLee/nagios-herald,kenzophuong/nagios-herald-1,kenzophuong/nagios-herald-1,etsy/nagios-herald,etsy/nagios-herald,BinLee/nagios-herald