Remove tab indexes

These caused the focus to jump around the page from input fields to the links at the top of the window, then to the suggestion links, which was very confusing.

Now, you simply tab through all elements as they appear.
Fix "autofocus" input element in popup window

Per http://stackoverflow.com/a/11400653
Move logout link in markup

This ensures that the default tab index for the logout link is correct.
Merge pull request #14 from cdzombak/cdz/tab-focus-improvements

Improve tabindex/focus behavior