Collective-venue

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- Fix indexer, where notes were not properly extracted and indexer failed.
[thet]

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- Allow to show venues via their uid from other subsites, which would otherwise
be inaccessible e.g. in a virtual hosting environment.
[thet]

- Add controlpanel with configure options for a venue search base folder and a
default venue. The search base folder is useful in multi-site environments.
[thet]

- Better SearchableText indexing.
[thet]

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- Remove Leaflet code. It's now in plone.formwidget.geolocation.
[thet]

- Remove the ``div.geolocation`` elements. Instead, render the list of
geolocation points as JSON value on a ``data-geopoints`` attrbute on the map
element.
[thet]

- Include a IEventAccessor implentation for IDXEvent and override the default
implementation from plone.app.event. This implementation's locaion property
returns a HTML link to a location object, if defined.
[thet]

- Remove ``geolocation_display.pt`` and ``geolocation_input.pt`` templates.
Those were just overriding the id attribute from the original templates under
``plone.formwidget.geolocation``. We should use css classes anyways.
[thet]

- Change the view name ``venue`` to ``venue_view`` to be more unique among
content being traversed and also named venue.
[thet]

- Remove Archetypes code. Since 2.0, we're only supporting Dexterity types
based on plone.app.event >= 2.0.
[thet]

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- Fix prepOverlay availability check, which has somehow changed to be only
available on jQuery objects and not jQuery itself.
[thet]

- JSLint'ing.
[thet]

- Also support IEventAccessor in get_location and fix location not beeing
displayed on ``event_listing`` views.
[thet]

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- initial.