roll.rb

  on :channel, /^#{self.nick} roll (\d*)d(\d+)($|[\+\-]\d+$)/ do |m, n, d, mod|
    total = 0;
	dice = n.to_i == 0 ? 1 : [n.to_i.abs, 10].min
	
    dice.times do
	  result = (Random.new).rand(1..d.to_i.abs)
      m.reply "#{m.user.nick} rolls a #{result}"
	  total += result
	end
	unless mod.to_i == 0
	  m.reply "Adding #{mod}"
	  total += mod.to_i
	end
	m.reply "Total: #{total}" if dice > 1 || mod.to_i != 0
  end