Fix #505 (get search results from content in all languages), #1513 (duplicate results + wrong language)
Fixed #1562 (tag page broken) and index status field for projects
Index the content of project sheet answers as part of the document, as it's most of the actual text of project sheets...
Finish fixing #1592 (wrong people were shown on tag page)
Fix #1564: Multisite was not obeyed in new search engine
Merge branch 'hotfix/search_engine_hotfix_2013-06'