=======================
 tasktracker directive
=======================

    >>> from opencore.tasktracker.interfaces import ITaskTrackerInfo
    >>> getUtility(ITaskTrackerInfo)
    <opencore.tasktracker.uri.TaskTrackerURI object at ...>

    >>> tt_info = getUtility(ITaskTrackerInfo)
    >>> tt_info.uri
    u'http://localhost:5050'

    >>> tt_info.external_uri
    u'tasks'
