updated readme

app/models/user.rb

@@ -0,0 +1,21 @@
+class User < ActiveRecord::Base
+  include Gravtastic
+  gravtastic :size => 165, :filetype => :png, :rating => 'R'
+    
+  # Include default devise modules. Others available are:
+  # :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable
+  devise :database_authenticatable, :registerable,
+         :recoverable, :rememberable, :trackable, :validatable
+
+  validates :username, :presence => true, :uniqueness => true
+
+  # Setup accessible (or protected) attributes for your model
+  attr_accessible :username, :email, :password, :password_confirmation, :remember_me
+  
+  has_many :topics, :dependent => :destroy
+  has_many :posts, :dependent => :destroy
+  
+  def admin?
+    true if self.username == 'codezombie'
+  end
+end