version bump
Remove 404's from the index

This will prevent returning pages that do not exists in search results even if they have been specified in the sitemaps.

This commit should fix #2.
Removing old entries

This change adds a timestamp field in the records. This fields allows us to delete any records that has not been updateded since X seconds. The actual number of seconds is specified with the "oldentries" config property.

Fixes #3.