Also, fixed all broken tests.

- Don't add a timeout for the GONE state.
- Change state to GONE when the user closes the chat box.
- Change the state to inactive when the user minimizes the chat box.
- Change the state to active when the users maximizes the chat box.
- Add more tests for chat states.

Converse.js will now send chat state notifications of <paused>, <inactive> and
<gone> when the user has stopped typing for 30 seconds, 2 minutes and 10 minutes
respectively.

removes need to modify index.html all the time.

Thanks to hawkee for the tip.

Conflicts:
	sass/converse.scss

Set immediate to true when calling _.debounce

When clicking on restore button for a minimized chat, the page's hash will change to `#`. It may cause problems for web apps that listen to changes in page's hash.

When `immediate` argument of `debounce` function is not set, `ev` is null and ev.preventDefault() will not be called.

Always show pending/requesting users in roster

Even if show_only_online_users or hide_offline_users
are set, show users that are pending or requesting