Update SessionNotifier To show groups bigger than two

[JuanCrg90]

Currently #10 has added support to create groups bigger than two

Is necessary update the SessionNotifier to show correctly this groups

remote-coffee-slack/lib/remote_coffee_slack/session_notifier.rb

Lines 30 to 34 in 537fb06

	def coffee_mates_formated
	coffee_mates.map do |mates|
	"<#{mates.first}> and <#{mates.last}>\n"
	end.join
	end