title: textarea autosuggest for both @mentions and #tags
body: <p>I am working in a rails 3.2 application and i have a requirement to provide auto-suggest for a text area to fetch @mentions users and #tags in the same textarea.</p>
  
  <p>To elaborate:
  when a user starts typing @ab... the autosuggest should fetch users fron json is provide and when he types #ab it should suggest tags from json i provide.If there are no tags for the letters entered the new tag should automatically get added to the suggest list and get appended to the textarea on click action.</p>
  
  <p>Please suggest some jquery option to enable thi feature in a textarea</p>