* VRFS-34 and VRFS-61; forgot to add new connection_track model

lib/jam_ruby/models/connection_track.rb

@@ -0,0 +1,15 @@
+module JamRuby
+  class ConnectionTrack < ActiveRecord::Base
+
+    self.table_name = "connections_tracks"
+
+    self.primary_key = 'id'
+
+    SOUND = %w(mono stereo)
+  
+    belongs_to :connection, :class_name => "JamRuby::Connection", :inverse_of => :connection_tracks
+    belongs_to :instrument, :class_name => "JamRuby::Instrument", :inverse_of => :connection_tracks
+
+    validates :sound, :inclusion => {:in => SOUND}
+  end
+end