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

Also, in Makefile, remove old HTML build first during "make html" step.

* Add buildout config for Sphinx
* Add new Sphinx theme
* Remove the built html theme files

* Fix login panel rendering bug
* Make registration form i18n aware.
* Make providers link configurable.

Added po2json module path to Makefile, make po2json now updates the file...

so that it properly gets hidden by switchTab

so that we can use require config in main.js also in the tests.

Properly disconnect after auth fail, so that we can log in again.
Don't reset the connection when logging out (not necessary).