Rer.sitesearch

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- fixed tabs order results [cekk]
- fixed bug in Plone timezones handling for start and end dates [cekk]

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- refactored view to support plone.app.search [cekk]
- moved configuration from site_properties to registry [cekk]
- added tests [cekk]
- customized "skip_links" viewlet for search view [cekk]

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- fixed indexes column population [cekk]

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- refactoring for Plone 4: now the template is removed and replaced by a view [cekk]

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- fixed update step [cekk]
- fixed first tab selection [cekk]

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- moved search from skins to a view, for Plone4 compatibility (it isn't new-search like yet) [cekk]
- added uninstall profile to remove skins [cekk]