when redirecting to /login, save the url and params to redirect back to

closes #164

app/controllers/application_controller.rb

@@ -55,6 +55,10 @@ class ApplicationController < ActionController::Base
     if @user
       true
     else
+      if request.get?
+        session[:redirect_to] = request.original_fullpath
+      end
+
       redirect_to "/login"
     end
   end

app/controllers/login_controller.rb

@@ -24,7 +24,13 @@ class LoginController < ApplicationController
     if user && user.is_active? &&
     user.try(:authenticate, params[:password].to_s)
       session[:u] = user.session_token
-      return redirect_to "/"
+
+      if (rd = session[:redirect_to]).present?
+        session.delete(:redirect_to)
+        return redirect_to rd
+      else
+        return redirect_to "/"
+      end
     end
 
     flash.now[:error] = "Invalid e-mail address and/or password."