New internal webinos API for intrazone notifications.

The new api 'zonenotification' is hosted by the PZH and then can
be subscribed to by web applications.  This can be used by the
webinos system to trigger notifications on key events, such as
a new user requesting access to the personal zone.

An example function is contained in pzh_webSessionHandling.js
for how to invoke notifications.

Jira issue: WP-523
Add notifications for new personal zone access requests.

The zonenotifications API is now used in the webSessionHandling
file to notify all interested applications when a new user has
requested access to the personal zone.  It provides a URL that
the user should be able to click to approve or deny the
request.

Jira issue: WP-523
Tests for the intrazone notification API.

These tests currently just make sure that the service is
discoverable and has basic elements.  Integration testing
is required.

Jira issue: WP-523