To allow for better template customization.

- Remove groupviews, so that they'll get recreated upon reconnection
- Don't call `clearSession` when reconnecting. We want to reuse the
  Backbone collections.
- Emit `rosterInitialized` event and use that in converse-rosterview.js
  (instead of overriding).
- Refactor `onReconnected` to emit `rosterReadyAfterReconnection`, call
  `converse.populateRoster()` and `converse.chatboxes.onConnected()`.
- Recreate the roster view on the `rosterReadyAfterReconnection` event.

It's not used and confuses people. Instead the message gets inserted via
`$.text`, to avoid injection attacks.

updates #714

BREAKING CHANGE: This module no longer supports Node.js 0.10

* Use roundcube plugin fork with current converse.js

The previous plugin developer is still running an ancient version of converse.js.  This updates the link to point to a fork that us running a current version of converse.js.

* Add up-to-date version of roundcube plugin to index.html too

Could be a different element as well.

The previous plugin developer is still running an ancient version of converse.js.  This updates the link to point to a fork that us running a current version of converse.js.

In the process also updated `updateSettings` to allow merging.

Including:
- Always render bookmarks list
- Hide bookmarks list if no bookmarks available
- Only send bookmarks stanza when appropriate

updates #203

Also moved chatview specific settings.

Also remove "jquery", will be loaded implicitly

- Updated to newest requirejs/text.
- Don't build dist files when running `make dev`

Split showRoomInfo into two new methods.

For better performance.