Added new autocomplete for task assignments.

Introduced the cool jquery token plugin.

app/controllers/users_controller.rb

@@ -0,0 +1,11 @@
+class UsersController < ApplicationController
+
+  # Currently used to display users nick and ids for autocomplete
+  def index
+    @users = User.where("nick LIKE ?", "%#{params[:q]}%")
+    respond_to do |format|
+      format.json { render :json => @users.map { |u| {:id => u.id, :name => u.nick} } }
+    end
+  end
+
+end