Improve channel, user and api_key models with basic scopes, correct references and protect attributes.

Simplify channels & user controllers and models, moving code to the models.
Remove catch-all route and ensure all actions are specified, fixing url paths.
Change clone to dup in feed_controller as using clone seems to affect the cloned object (problem only in ruby 1.9.3?)

app/views/users/forgot_password.html.erb

@@ -1,7 +1,7 @@
 <h2><%= t(:password_forgot) %></h2>
 <%= t(:password_forgot_message) %>
 <br /><br />
-<%= form_for @user, :url => { :controller => 'mailer', :action => 'resetpassword' } do |f| %>
+<%= form_for :user, :url => resetpassword_path do |f| %>
 	<input name='userlogin' class='userlogin' />
 	<%= f.text_field :login %>
 	<%= f.submit t(:submit) %>