Consider xapit search conditions

[ryanb]

It is possible to customize search query conditions in the xapit call.

xapit :conditions => "visible=1"

These conditions should be taken into consideration when reindexing changes.

For example, if a record is created but doesn't fit into xapit conditions then it should be ignored. If a record is being updated and no longer fits into xapit conditions then the index should be removed.

[matiaskorhonen]

This is the one issue that is currently preventing me from using Xapian/Xapit.