Collective-geo-flexitopic

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- disable search inside BBOX with c.g.index
- fixes

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- search inside a BBOX with collective.geo.index
- support for plone.app.collection
- use Vectorlayer instead of GMLLayer
- add caching

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- Added support for Spanish localization [macagua]
- Added improvements about the Internationalization [macagua]
- plone 4.1 compatible

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- Initial release