Added Sequel migrations and models for videos and channels; Fixed database name in Rakefile and defaults config file

lib/models/channel.rb

@@ -0,0 +1,5 @@
+class Channel < Sequel::Model
+
+  one_to_many :videos
+
+end

lib/models/video.rb

@@ -0,0 +1,5 @@
+class Video < Sequel::Model
+
+  many_to_one :channels
+
+end

lib/routes/index.rb

@@ -1,14 +1,7 @@
 namespace '/' do
 
   get '' do
-    channels = [
-      {
-        :name => 'Bit Goblin',
-        :openProjects => 'N/a',
-        :totalProjects => 'N/a',
-        :last_updated => 'N/a'
-      }
-    ]
+    channels = Channel.reverse(:updated_at).limit(10).all()
     erb :index, :locals => {
       :title => 'Dashboard',
       :channels => channels