Ps.plone.mls

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- Develoments Summary: get custom css class for prettier results

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- improve Developments Summary View
- improve Developments Detail View: no prettyPhoto Iframe links for phase-listings

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- Added Developer MLS Embedding.
- Added additional fields to customize the contact information (agency and agent).
- I18N updates.

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- Initial release.
- Added 'Featured Listings' content type and viewlet.