Collective.eeafaceted.dashboard

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- Check if received `pod_template` has a `max_objects` before restricting
number of `brains` to `max_objects`.
[gbastien]

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- Limit the number of items that can be generated in a DashboardPodTemplate.
[odelaere]

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- Implement our own `IDashboardGenerablePODTemplates` adapter like it is the
case for `collective.documentgenerator` `IGenerablePODTemplates` adapter to
be used in the `dashboard-document-generation-link` viewlet so it is
registered for `IFacetedNavigation` and easier to override when necessary.
[gbastien]

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- Adapted override of `collective.documentgenerator` method
`get_all_pod_templates` now that it is handled by an `IGenerablePODTemplates`
adapter instead the `DocumentGeneratorLinksViewlet`.
[gbastien]

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- Adapted code to render term as term.value does not contain the collection
object anymore but it's path.
[gbastien]
- Do not compute kept_criteria when widget is rendered outside dashboard as
faceted criteria will not be displayed.
[gbastien]
- Use `collectionwidget.utils.getCurrentCollection` to get the current
collection to use for `DashboardFacetedTableView` columns.
[gbastien]

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- Added function utils.addFacetedCriteria to ease applying a faceted conf xml
that adds extra faceted criteria to an existing dashboard.
[gbastien]
- Improved template evaluate method to avoid getting collection and criterias
if not necessary
[sgeulette]
- Display dashboard-document-generation-link only on IFacetedNavigable
[sgeulette]
- Corrected robot tests
[sgeulette]